Used Pad Printer for sale (3,524)

Condition: good (used), Year of construction: 1994, I will sell a Tampoflex Jumbo 150-400 pad printing machine, manufactured in 1994. Functional and in good condition. Iisdpfx Asv Eqatsg Ujc

Condition: refurbished (used), functionality: fully functional, machine/vehicle number: 140L-C, Year of construction: 2022, operating hours: 5,854 h, total length: 1,450 mm, total height: 1,040 mm, total width: 1,250 mm, type of input current: AC, overall weight: 380 kg, input voltage: 400 V, input current: 12 A, input frequency: 50 Hz, ambient temperature (min.): 10 °C, ambient temperature (max.): 40 °C, electrical fuse: 16 A, table width: 500 mm, tank capacity: 140 l, table length: 700 mm, power: 8.3 kW (11.28 HP), travel speed (max.): 24,000 mm/min, number of print heads: 2, Refurbished Industrial Fused Filament Fabrication (FFF) Printer Includes: - 140L-C printer - Vibration-damped platform - License for slicing software (Simplify3D) Original price €73,800 General Technical Data: Model: HAGE 3D-140L-C Year of manufacture: 2022 Operating hours: 5,854 h Printing technology: FFF (Fused Filament Fabrication) Filament diameter: 1.75 mm; open material system (not limited to specific manufacturers) Build area (L x W): 700 mm x 500 mm Maximum print height: 400 mm Maximum build volume: 140,000 cm³ Dimensions and Weight: Length: 1,450 mm Width: 1,250 mm Height: approx. 1,040 mm Weight: approx. 380 kg Temperature: Maximum printhead surface temperature: 300°C (optionally 450°C) Maximum build plate surface temperature: 180°C Maximum chamber temperature: 85°C Minimum operating temperature: +10°C Maximum operating temperature (ambient): +40°C Electrical Data: AC input: 400 V / 50 Hz Power supply: 24 V DC Connection: USB 3.0 / Ethernet Print Specifications: X-axis speed: up to 400 mm/s Y-axis speed: up to 400 mm/s Z-axis speed: up to 300 mm/min XY-plane print accuracy: < 0.1 mm Printer Control: Industrial controller (Sigmatek) Software: HAGE3D All documentation available Platform: Isdpfx Agoxuh Nyo Ujic 1,450 x 1,250 x 600 mm (LxWxH) Including storage compartments Including machine feet with vibration damping

Condition: repair required (used), functionality: not functional, Year of construction: 2019, System is offered as defective. The Vida is a cost-effective, low-maintenance and user-friendly premium 3D printer for a wide range of professional and medical applications. Iiodpfx Agorq Ic Ee Usc It has a high-resolution 1920 x 1080 pixel projector with individualized UV optics. This creates an exceptionally fine surface structure. Compared to competing technologies, this enables almost seamless results. In addition, an impressive range of materials can be used to cover dental, orthodontic and auditory applications.

Condition: used, Year of construction: 2011, functionality: fully functional, machine/vehicle number: 700168, type of input current: AC, Automatic stencil printer Ijdpfx Aeyidw Uog Usic Speedprint Technology Model: SP700 AVI Used, fully functional

Condition: excellent (used), functionality: fully functional, machine/vehicle number: 33234, Year of construction: 2013, Stratasys Objet 260 Connex – Professional 3D Printer For sale: Stratasys Objet 260 Connex 3D printer, year of manufacture 2013. The machine comes from a professional environment and is suitable for applications such as prototyping and product development. Optional accessories are negotiable. Further information available upon request. Iiodpfxjyag Imj Ag Usc

Year of construction: 2026, condition: new, functionality: fully functional, new PMH filament line extruder 30 mm - 28 l/d with noozle for 3D-filament with cooling tank with blow-up system for adhesive water with Laser control system (option) with puller with filament accumulator (option) with winder and traverse guide Isdpfx Aoch Sfqog Ujic MADE in GERMANY

Condition: not inspected (used), Dear Sir or Madam We hereby offer you the following device for sale: Keyence Agilista 3200W 3D printer. The machine is sold with the equipment documented in the photos and recorded in the advert text. Iiedswktwkjpfx Ag Usc Location: 40764 Langenfeld ATTENTION: The device comes from an insolvency. We are auctioning it for the highest bid on behalf of the creditor/bank. This is a closed auction. We do not give any information about the current highest bid. Your bid becomes binding upon receipt by e-mail. Please inform us of your binding bid by 07.12.2025 at 10 am. You will be informed of the outcome of the auction within 72 hours of the end of the auction.

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: 28.22.0079, Year of construction: 2022, operating hours: 6,700 h, overall weight: 1,870 kg, laser power: 700 W, operating pressure: 8 bar, inner dimension height: 365 mm, inner dimension length: 280 mm, No minimum price – guaranteed sale to the highest bidder! The system has been serviced annually by SLM Solutions. Service reports and machine assessment are available upon request. The system includes the “SLM280 2.0 complete material change kit incl. PSM100” and a second set of filter housings, minimizing the effort required to switch between two materials. TECHNICAL DETAILS Laser power: up to 700 W Materials: suitable for all common materials in the SLM process Temperature range: 20–25 °C Relative humidity: max. 60 % Floor unevenness: max. 5 mm/m² Floor load capacity: min. 2,200 kN/m² Floor surface: antistatic, solvent-resistant, impermeable to liquids, smooth Processing area and process data Build volume (L x W x H): 280 x 280 x 365 mm Actual build rate: up to 113 cm³/h Variable layer thickness: 20–90 µm Minimum feature size: 150 µm Beam focus diameter: 80–115 µm Scanning speed: max. 10 m/s Laser type: IPG fiber laser Single laser 700 watts Media supply Operating pressure argon: 7–8 bar Operating pressure nitrogen: 7–8 bar Iiodjy Rn A Ijpfx Ag Uec Operating pressure compressed air: 7–8 bar Operating pressure cooling water: 4 bar Compressed air quality: ISO 8573-1:2010 [1:4:1] Volume flow rate primary circuit: 1.4 m³/h Cooling water inlet temperature min.: 18 °C Cooling water inlet temperature max.: 20 °C Cooling medium: Coolflux MACHINE DETAILS Control system: SLM MCS Electrical connection values Connection: CEE 3/N/PE Voltage: 400 ±10 % V Frequency: 50/60 Hz Current draw: max. 40 A Connected load: 3.5–5.5 kW Heating power: 1,200 W Cooling power: 4.6 / 5.8 kW Largest motor: 7.5 kW Dimensions & weight Dimensions (L x W x H): 2,600 x 1,200 x 2,700 mm Shipping weight: 1,870 kg Operating hours: approx. 6,700 h EQUIPMENT Cooling is provided by “Cooling unit HRS050 L/W” Sieving station PSM100 V3 Handling device BPH280 and bottle lift (facilitates handling of powder containers and removal of substrate plates after printing) SLM280 2.0 complete material change kit incl. PSM100 Powder containers Substrate plates (1.2709 & AlSi10Mg) Additional filter housings Filter elements The system is currently still in operation and can be inspected by appointment. After the auction, the system will be disassembled by the machine manufacturer, loaded onto the company premises, and handed over to the buyer.

Condition: used, offer for central drum flexo press FLEXOTECNICA NG10 from year 2009 with 1280 mm web width Iedpfxjy Sfcns Ag Usic

Condition: refurbished (used), functionality: fully functional, iAM Marketplace – the official used machinery partner of Stratasys! Several professionally refurbished Stratasys J35 Pro 3D printers are available immediately. Each machine undergoes a comprehensive inspection according to strict standards, with all print-relevant components overhauled and validated through multiple test prints. The result: reliable performance, high print quality, and a cost-effective alternative to a new machine. The machines differ in year of manufacture, equipment configuration, and operating hours. Detailed information on condition and price range is available upon request. Iiedpjywvgzofx Ag Usc The Stratasys J35 Pro is a compact industrial PolyJet multi-material 3D printer with a build area of 1,174 cm². The machine is suitable for realistic design and functional prototypes as well as highly detailed models and can process up to three materials simultaneously in a single print job. This allows you to combine different material properties—such as rigid, transparent, flexible, or impact-resistant areas—within a single component. With a layer thickness of 18.75 μm and high dimensional accuracy, the J35 Pro delivers precise, repeatable print results with extremely fine details and smooth surfaces.

Condition: used, functionality: fully functional, machine/vehicle number: 570150, Year of construction: 2015, operating hours: 10,018 h, Stratasys Objet Connex 500 3D Printer (Purchased April 2015) Iodjy S Rp Hspfx Ag Ujic A complete set of instruction manuals and safety data sheets for printing and cleaning materials is included. Spare Components: 2 x polyjet print head spares (new) 2 x thermistors (bagged) 1 x new bulb 1 x used bulb (left) – 3610 hours of use 1 x used bulb (right) – 4539 hours of use 2 x Assy Wiper Leaf (used) 2 x Roller Bath Blades Kit, Filter & Accessories – several items bagged together 1 x Eden MCB – in good condition 4 x Support Cleaning Fluid (1 x OBJ-03216, 3 x OBJ-03214, all expire in February 2026) The unit was decommissioned by the authorized service contract team in July 2023 and no longer has a current service contract.

Year of construction: 2015, condition: excellent (used), Octopus Automatic Check Weigher with Printer Labeller Weight range 40grams to max 6kg Fully stainless steel Iiedsn R Syispfx Ag Usc With VWS Printer labeller, Type LPX R Blow XL, Model PX4 / 300 Currently running a 100mm wide label Dimensions 1700mm long, belt width 300mm Video of machine in use avilable on request In excellent condition

Year of construction: 2010, condition: repair required (used), functionality: limited functionality, controller model: MTT AutoFab, inner dimension height: 250 mm, laser power: 400 W, machine/vehicle number: SLM2501004, laser type: fiber laser, Equipment: dust extraction, No reserve price – guaranteed sale to the highest bidder! Note: The machine is in visually clean condition. It is also technically complete and the laser has been replaced by the manufacturer. However, the printer has limited functionality with regard to focus quality at the edge areas, which is presumably due to the optics and therefore requires adjustment or repair. TECHNICAL DETAILS Process: Selective Laser Melting (metal 3D printing) Laser: IPG fiber laser (replaced by manufacturer) Laser power: 200 W Total power: 400 W Maximum power: 900 W Adjustable output power: 10 - 105 % Long-term output stability: ± 3 % Beam quality: < 1.1 M² Wavelength: 1,075 ± 5 nm Spectral linewidth FWHM: < 3 nm Maximum modulation frequency: 50 kHz Build height: 250 mm Shielding gas operation: Argon/inert gas Cooling: water-cooled Cooling temperature: < 30 °C MACHINE DETAILS Laser type: YLR-200-WC Isdpfx Agey H Hxyj Ueic Electrical voltage: 85 / 240 V AC Current: 15 A Laser hours: 0.1 h Pump runtime: 2,644 h Power-on hours: 5,017 h Heating power: 1,000 W Nominal temperature: 18 - 30 °C Air pressure: 6 bar Ambient temperature: 0 - 45 °C Dimensions & Weight Dimensions (W x D x H): 3U 19" rack Machine weight: 60 kg EQUIPMENT • Powder System PSH 100 • Extraction and filtration system • Chiller unit • 5x powder bottles (5 L) • 6x substrate plates • 10x filter elements (H13) • 26x wiper lips • Spare sieves • Protective suits • Cleaning wipes for optics (F-theta) • Various small parts & spare components

Condition: used, functionality: fully functional, total length: 140 mm, total height: 1,300 mm, overall weight: 1 kg, Artec Space Spider professional 3D scanner, tested and fully functional. High-resolution handheld scanner with blue structured-light technology, ideal for reverse engineering, quality control, medical applications, and precision digitization. KEY FEATURES: - 3D resolution: up to 0.1 mm - Accuracy: up to 0.05 mm - Technology: blue structured light (safe for scanning people) - Color scanning - Weight: 0.85 kg (portable, handheld) - Includes original carrying case and cabling APPLICATIONS: reverse engineering, dimensional quality control, dental and medical (custom prosthetics/orthotics), heritage and art, jewelry, industrial design. Iijdoy U H Rxjpfx Ag Uoc Unit from a professional service bureau. Available for demonstration prior to purchase. Location: Spain. Easy shipping throughout Europe. Please inquire about the Artec Studio software license type and included accessories.

Condition: used, functionality: fully functional, Year of construction: 2017, total length: 2,210 mm, total height: 1,448 mm, total width: 1,238 mm, type of input current: three-phase, input voltage: 400 V, HP Multi Jet Fusion 4200 additive manufacturing system, tested and fully functional. An industrial solution for the series production of end-use parts in PA12 nylon. THE SYSTEM INCLUDES: - HP Jet Fusion 4200 printer - HP Processing Station (powder processing station) - Build Unit(s) MAIN FEATURES: - Technology: Multi Jet Fusion (MJF) - Build volume: 380 × 284 × 380 mm - Material: PA12 (nylon 12) Isdpfxey U H Ids Ag Ueic - Production of short and medium series of functional end-use parts - Year of manufacture: 2017 - Three-phase power supply APPLICATIONS: industrial, automotive, medical (prosthetics and orthotics), consumer goods, on-demand spare parts. Equipment from a professional service bureau. Available for pre-purchase inspection. Location: Spain. Loading and transport can be arranged. Please inquire about the detailed inventory of Build Units, consumables, and the included powder stock.

Condition: used, functionality: fully functional, machine/vehicle number: 155-10000, Year of construction: 2014, total length: 1,281 mm, total height: 1,962 mm, total width: 895 mm, type of input current: three-phase, overall weight: 601 kg, input voltage: 208 V, input current: 18 A, Stratasys Fortus 450mc industrial 3D printer in excellent condition, tested and fully functional. Professional-grade FDM technology for the production of parts in high-performance engineering thermoplastics. KEY FEATURES: - Build volume: 406 × 355 × 406 mm - Technology: FDM (Fused Deposition Modeling) with dual extruder - Materials: ULTEM 9085, ULTEM 1010, Nylon 12, Nylon 12CF (carbon fiber), PC, ABS-M30, ASA, Antero 800NA (PEKK) - Heated build chamber - Soluble support material - Year of manufacture: 2014 - Three-phase power supply Iisdsy U H Hmjpfx Ag Usc APPLICATIONS: aerospace, defense, automotive, medical, industrial tooling, and functional prototyping. Particularly valued for its ability to print certifiable ULTEM. Equipment from a professional service bureau, maintained under controlled conditions. Available for inspection and operational testing prior to purchase. Location: Spain. Loading and transport can be arranged. Please inquire about the availability of consumables, accessories, and software licenses.

Condition: used, total width: 840 mm, total length: 1,870 mm, total height: 1,250 mm, Equipment: documentation/manual, Manufacturer : Alfalas / Tampoprint Model : Workstation SK90 Type of system : Combination system consisting of pad printing machine, marking laser, suction unit and turntable Laser class (system) : 1 Iiedpfx Ajtvm Sbeg Uec Laser class (beam source) : 4 Laser type : Solid state, Nd:YAG Year of manufacture: 01/2003 Operating mode: CW/QS Power: approx. 60 W Wavelength: 1064nm

Condition: refurbished (used), functionality: fully functional, iAM Marketplace – The Official Used Machinery Partner of Stratasys! Several professionally refurbished Stratasys Fortus 450mc 3D printers are immediately available. Each machine undergoes a comprehensive inspection according to strict standards, is thoroughly overhauled—focusing on all print-relevant components—and validated through multiple test prints. The result: reliable performance, high print quality, and a cost-effective alternative to new machinery. The machines vary in year of manufacture, configuration, generation, and print hours. Detailed information regarding condition and pricing is available upon request. Iijdpfx Aoyvz Smeg Uoc The Stratasys Fortus 450mc is an industrial FDM 3D printer featuring a build volume of 406 x 355 x 406 mm. This machine is suitable for functional prototypes, production tooling, end-use parts, and small-series applications. It excels with high dimensional accuracy, repeatable print results, and reliable performance in industrial environments. Thanks to its wide material compatibility—including high-performance and ESD materials—the Fortus 450mc can be flexibly deployed for various applications in manufacturing, aerospace, automotive, and general industry.

Condition: used, This listing is for a Sony UP-D895 Digital Graphic Printer. The unit is in full working condition and is ready for immediate release. Sony UP-D895 Digital Graphic Printer The UP-D895 is engineered specifically for medical environments, ensuring high-quality prints of critical imaging studies. Key Features: High-Resolution Printing: Produces sharp and clear images, essential for accurate medical diagnoses, with high detail suitable for radiology. Efficient Printing Technology: Utilizes advanced printing technology that ensures reliable performance, reducing downtime in busy medical facilities. Compact Design: Lightweight and space-saving, making it ideal for crowded radiology departments without compromising on functionality. User-Friendly Interface: Features a front panel with intuitive controls and a jog dial, allowing for easy navigation through menu functions, enhancing operational efficiency. Increased Memory: 10MB memory capacity supports higher throughput, enabling the printer to handle multiple jobs quickly, which is crucial in high-demand environments. “Resize-to-Fit” Feature: This functionality allows for the enlargement of images to fit the desired print size, accommodating various diagnostic needs. Media Compatibility: Iodpfx Agsxxy N Ho Ujic Compatible with a range of printing media, including UPP-110S, UPP-110HD, and UPP-110HG papers, offering flexibility based on imaging requirements. Ideal Applications: Medical Imaging: Specifically designed for printing X-rays, MRIs, and CT scans, ensuring that medical professionals can review images with high clarity. Radiology Departments: Perfect for use in hospitals and clinics where quick and reliable printing of diagnostic images is essential for patient care.

Condition: used, This listing is for the Sartorius Tare ENTRIS2201-1S Balance + Tare Printer Iedpfxoxui S Ao Ag Usic The unit is in full working condition and is ready for immediate use The Sartorius ENTRIS2201‑1S (also referred to as ENTRIS 2202‑1SUS in some regions) is a precision top-loading laboratory balance designed for reliable, accurate weighing of samples up to approximately 2,200 g with 0.01 g readability. Key Specifications: Capacity: 2,200 g Readability (Resolution): 0.01 g (10 mg) Repeatability: Typically 0.01 g Linearity: Approximately 0.03 g Weighing Pan Size: Around 182 mm × 182 mm (7.1″ × 7.1″) Calibration Type: External calibration (requires separate calibration weight) Display: Backlit, high-contrast screen for clear visibility Interface Options: RS‑232 port for communication with PCs or printers Built-In Functions: Includes modes for basic weighing, counting, percent weighing, animal weighing, and density determination Language Support: Multiple languages supported such as English, French, German, Italian, Polish, Russian, Spanish Other Features: Anti-theft locking capability, easy-to-clean removable pan and draft shield Stabilization Time: Approximately 1.5 seconds Dimensions & Build: Compact size, robust design ideal for lab environments

Condition: used, This listing is for a Mettler RS-P42 Printer. Iedoxx Afdopfx Ag Ujic The unit is in full working condition and is ready for immediate release. The Mettler Toledo RS-P42 Printer is a compact and reliable dot matrix printer designed for use with Mettler Toledo balances and analytical instruments via an RS232C interface. It provides fast and efficient documentation of weighing results, including regular adjustments and specific application data. With a small footprint, it produces 5 cm wide printouts, making it easy to include results in lab journals. The RS-P42 is ideal for labs needing GLP, GMP, and ISO-compliant documentation. Key Features: Dot matrix printing (24 characters/line) Print speed: over 1 line per second RS232C connectivity for easy integration with balances Compact design for space-saving use in laboratories

Condition: used, This listing is for a Sartorius Cubis MSE2202S-100-D0 Balance with printer. The unit is in full working condition and is ready for immediate release. The Sartorius MSE2202S-100-D0 is a top-of-the-line balance from Sartorius’ Cubis series, offering precision, advanced functionality, and robust design, making it ideal for various laboratory settings. With a significant capacity and a range of built-in applications, this balance is suited for demanding weighing tasks. Key Features: High Capacity and Readability: Capacity: 2,200g Readability: 10mg (0.01g) This allows for precise measurements of both small and larger samples, making it versatile for different applications. Generous Weighing Pan: Dimensions: 206 x 206mm (W x D) Ample space for weighing liquids, powders, pastes, or solid samples without risk of spillage. User-Friendly Control Panel: Features a keypad and LCD display with text prompts for easy navigation and activation of functions, enhancing user experience. Built-in Applications: Comes with nine built-in applications for various tasks, including: Unit conversion isoCAL (automatic calibration) Density determination via the buoyancy method Net/total formulation Weighing in percent Counting Connectivity Options: Equipped with a USB port for data transfer to PCs (compatible with Windows 7, Vista, XP, 2000, ME, or 98SE) and an RS-232C port for connecting peripheral devices, allowing for easy integration into lab setups. Accuracy Features: isoCAL: Automatic internal calibration ensures precision based on temperature and time, reducing user intervention. Automatic Levelling: Achieved at the touch of a button, simplifying setup. Security Features: Includes a fastening point for attaching an anti-theft locking device, enhancing security in shared or public environments. Robust Design: Ingress Protection Rating: IP54, which protects against dust and water splashed from all directions, making it suitable for various lab environments. Operating Temperature Range: 5 to 40°C at 80% RH, ensuring reliable performance under different conditions. Technical Specifications: Capacity: 2,200g Readability: 10mg Linearity/Repeatability: 20mg/7mg Minimum Sample Weight (USP Standards): 10g Weighing Units: gram, kilogram, carat, pound, ounce, troy ounce, grain, pennyweight, milligram, parts per pound, Austrian carat, Newton, pound:ounce, microgram Display: LCD Isdpfjxxzhdex Ag Usic Power Supply: 100-240V, 50-60Hz (includes 120V line cord) Weighing Pan Material: Stainless steel Compliance: ISO, FDA, USP, GxP; IP54

Condition: used, This listing is for the Sartorius ydp3 0Printer The unit is in full working condition and is ready for immediate use The Sartorius YDP30 is a compact, high-performance thermal printer designed for laboratory environments, particularly for generating GLP-compliant printouts from Sartorius balances such as the Practum, Quintix, Secura, MA37, and MA160. It supports both thermal transfer and direct thermal printing methods, offering flexibility for various labeling needs Iijdpfx Asxv Dk Ajg Uoc

Condition: used, This listing is for a Zebra TLP 3842 Printer. The unit is in full working condition and is ready for immediate release. The Zebra TLP 3842 is a thermal transfer barcode printer designed for high-quality printing of labels, tags, and barcodes. Its advanced technology ensures clear, precise output, making it ideal for various labelling needs. Key Specifications: Print Resolution: 300 dpi resolution allows for high-quality graphics and small text, ensuring legibility and detail. Print Width: Supports a maximum print width of 4 inches, accommodating a range of label sizes. Connectivity: Equipped with multiple interfaces: Parallel, Serial, and USB, providing flexible connectivity options for different setups. Memory: 512 KB RAM and 1 MB Flash memory support efficient processing and storage of label formats and graphics. Power Supply: Comes with a U.S. power supply; a dispenser option is also available for added functionality. Real-Time Clock: Note that the printer does not include a real-time clock, which may be relevant for time-stamping labels. Iiedpfexxyl Iex Ag Usc Applications: Prescription Bottle Labelling: Ideal for pharmacies requiring accurate and clearly printed labels for medications, ensuring compliance and safety. Laboratory Specimen Labelling: Perfect for labs needing to label samples and specimens clearly, minimizing the risk of mis-identification. Electrical Component and Mechanical Part Labelling: Useful in manufacturing settings for labelling parts and components, aiding in inventory management and traceability.

Condition: used, This listing is for the Adam Solent Precision Analytical Balance + Adam ATP Printer The unit is in full working condition and is ready for immediate use Iijdpfx Aoxhfgvog Uoc The Adam PW124 analytical balance is a reliable, precision instrument tailored for tasks requiring high accuracy—such as chemical analysis, formulation, and quality assurance. It combines ease of use, robust features like internal calibration and GLP-compliant data outputs, and sturdy construction that supports dependable performance in demanding laboratory environments. Key Features Exceptional Precision: Readability of 0.0001 g, repeatability around 0.0002 g, and linearity approximately 0.0002 g Backlit LCD Display: Easily readable under varying lighting conditions, with programmable backlight settings Calibration: Equipped with internal calibration, eliminating the need for external weights Connectivity: Includes an RS‑232 port for interfacing with PCs, printers, or data-loggers; supports GLP-compliant printouts with date and time Capacity Tracker: Visual indicator to help prevent overloading the balance Additional Functions: Offers selectable digital filtering for stability in changing environments, multiple weighing units, and standard lab weighing modes (e.g., check-weighing, parts-counting, percentage weighing, net/total) Security and Durability: Features password protection, a security slot for locks, sealed keypad, and robust metal housing—suitable for long-term lab use GLP Compliance: Capable of generating reports that include crucial data such as time, date, and calibration verification