Used Stencil Printer for sale (2,688)

Year of construction: 2018, condition: ready for operation (used), An HP additive manufacturing system for PA12 nylon including accessories is available. Printing technology: Multi Jet Fusion, build volume X/Y/Z: 380mm/284mm/380mm, material: PA12 (Nylon 12), machine dimensions X/Y/Z: approx. 2250mm/1250mm/1450mm, weight: approx. 750kg, operating hours: approx. 16300h. Including HP powder processing station, 3x HP build units, 3x printheads, 2x heat lamps and 5x fusion lamps. Documentation available. An on-site inspection is possible. Chjdpfx Aozqfwteb Djb

Condition: excellent (used), Here we offer you a 3D SYSTEMS 3D printer. The ZPrinter ProJet 660 Pro 3D printer features a large build volume. This allows even large models to be produced without prior division. Furthermore, the large base area increases productivity when printing many small models in a single print job. 3D color printer with enormous productivity and color accuracy. The ProJet ColorJet color 3D printers from "3D Systems", also known as ZPrinters, operate using a layer-by-layer process based on the ColorJet CJP "Binder Jetting" process, directly in a powder bed. As a result, even with complex and highly detailed prints, these 3D printers do not require dedicated support structures. The unsolidified powder supports the parts during printing and is then semi-automatically recycled. Application areas: Communication of form and design, installation analyses, initial functional testing, variant testing, form finding, design, development, marketing, sales, master models for deep drawing, dental models, presentation... Best ColorJet 3D color printer in its class for applications with the highest demands, it sets new standards in the field of 3D full-color printing systems. Technical data: ZPrinter ProJet 660 Pro 3D printer Cedpfx Ajzdyxreb Djhb Build format: 254 x 381 x 203 mm Color: 390,000 colors (5 print heads, including black) Resolution: 600 x 540 dpi Minimum detail size: 0.1 mm Automation: Fully automatic (automated setup and self-monitoring, automated powder loading, automated recycling and powder removal, locking binder cartridges, intuitive control panel) Vertical build speed: 28 mm/hour Material options: High-performance composite material Layer thickness: 0.089-0.102 mm Number of jets: 1520 Details: ZPrinter ProJet 660 Pro 3D printer File formats for printing: STL, VRML, PLY, 3DS, ZPR Device dimensions: 188 x 74 x 145 cm Device weight: 340 kg Power requirements: 100-240 V, 1.5-7.5 A Workstation compatibility: Windows® 7, Windows® XP Professional and Windows Vista® Business/Ultimate Legal regulations: CE, CSA Special setup requirements: None Type: ProJet 660 Pro 3D printer Condition: used Scope of delivery: (See image) (Changes and errors in the technical data are subject to change!) We will be happy to answer any further questions you may have by telephone.

Condition: excellent (used), Eos EOSINT plastic laser sintering systems Here, we offer an Eos EOSINT plastic laser sintering system. Eos EOSINT plastic laser sintering system P380 The following items are included with the EOS P380 system: Build volume container Powder container Overflow container Cooler: Termo TEK thermochiller, type: 802-18644-3 Unpacking ram Removal carriage 3DM 8-zone process chamber heater 250°C Each zone can be adjusted individually, homogeneous temperature field ± 1°C Kelvin 350mm x 350mm x 610mm Voltage 3/N/PE/400V AC Frequency 50 Hz Connected load 8 kW Fuse 32 A MAX. laser power 100 W Laser class open 4 Laser class closed 1 Weight 850 kg Type: EOSINT P 380 Condition: used Scope of delivery: (See image) Csdszdywzopfx Ab Dehb (Changes and errors in the technical data are subject to change!) We will gladly answer any further questions you may have over the phone.

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: Serie number D00794, operating hours: 9,230 h, Stratasys F370 3D printer Chedpfxjy N Dhqs Ab Dob

Condition: used, functionality: fully functional, Year of construction: 2021, We offer this used Raise3D E2CF 3D printer, model Raise E2CF, manufactured in 2021. Product name: 3D printer Model number: E2CF Power: 350 W Voltage: 100–240 V Frequency: 50/60 Hz Current: 4 A Weight: 35 kg Chodpfxszuk D Ts Ab Dsb If you have any questions or require further information, please send us a message or contact us by phone.

Condition: excellent (used), Stratasys 3D Printer Dimensio elite Here, we offer a Stratasys 3D printer, Dimensio elite. Stratasys 3D printer Dimensio elite The Dimension Elite 3D printer is part of Stratasys’ Design Series. The Dimension Elite printer is ideal for printing 3D prototypes and for modeling functional components, such as medical devices, mobile electronic devices, or precision instruments. With a simple click on “Print,” the CAD file is prepared, and the printing process is started. After easily removing the soluble support material, a precise and highly detailed component is revealed. Manufacturer: Stratasys Type: Professional operation Material(s): ABS Technology: Fused deposition modeling Chjdozdnpropfx Ab Djb Assembly: Plug&Play Size: 686x914x1041 Weight (kg): 136 Nozzle opening (mm): - Layer thickness (µm): 178 Speed (mm/s): - Precision (µm): - Filament thickness (mm): - Maximum build volume (mm): 203x203x305 File format: .stl Software: CatalystEX Software Connections: Ethernet Operating system: Windows XP, Windows 7 Required power: 100 to 120 VAC, 60 Hz, at least 15 A on a dedicated circuit or 220 to 240 VAC, 50/60 Hz, at least 7 A on a dedicated circuit Type: Dimensio elite Condition: used Scope of delivery: (See image) (Changes and errors in the technical data and specifications are subject to change!) We would be happy to answer any further questions you may have over the phone.

Condition: excellent (used), Here, we offer you a Stratasys Objet 3D printer. The Objet Connex 500 is the groundbreaking multi-material 3D printer from Objet. With a large build volume of 500 x 400 x 200 mm, designers and engineers can quickly create prototypes to simulate the intended end product more closely than with any other technology. What makes the Objet Connex unique? With Objet's patented simultaneous multi-material inkjet technology, the Objet Connex 500 can print models from up to 14 different materials in a single print job. The system is ideal for designers and engineers who want to effectively highlight the different material components in complex or composite products. Freedom to choose your own materials The Objet Connex 500 offers an unparalleled selection of over 60 materials, including up to 51 Digital Materials™. With it, users can simulate various mechanical and physical properties, from rubber to rigid, opaque to transparent, and standard to ABS engineering plastics. Excellent productivity The Objet Connex 500 offers: • Multi-material models - no need to design, print, and glue separate model elements together • Different parts. Different materials. Same tray - saves time and serves multiple requirements simultaneously • Excellent 16-micron print accuracy with high resolution • 600 DPI X & Y resolution • Thin walls up to 0.6 mm • Large-format tray with dimensions of 500 x 400 x 200 mm - allows printing of large parts in a single build or many small parts on a single tray • High throughput - up to 20 mm per hour and layer • Reliability and robustness - at least 72 hours of uninterrupted capacity • High speed - simultaneous printing of multiple items from different materials; models cure during printing; models can be processed immediately after printing • Easy-to-remove support material for complex geometries • Office comfort - quiet system with fully sealed, REACH-compliant cartridges that are easy to load and unload. According to the last operator, it is in working condition. No functional test has been carried out by our company. Year of manufacture: 2010 Type: Objet Connex 500 Chodozdnplspfx Ab Djb Condition: used Scope of delivery: (See picture) (Changes and errors in the technical data, information are subject to change!) We will be happy to answer any further questions you may have by telephone.

Condition: excellent (used), Stratasys 3D Printer Dimension Here we offer a Stratasys 3D printer, Dimension model. Stratasys 3D Printer Dimension The Dimension 3D printer is part of Stratasys' Design Series. Manufacturer: Stratasys Type / Printing Technology: FDM (Fused Deposition Modeling) Build Volume: 20.3 x 20.3 x 30.5 cm Printable Material / Filaments: original ABSplus spools, or other ABS or HIPS materials Dimensions and Weight: 68.6 x 91.4 x 104.1 cm; 127 kg Build Platform: Plastic; reusable Software / File Types / Operating Systems: CatalystEX / STL / Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista Special Feature: ideal for complex 3D models with a resolution of 0.178 mm or 0.25 mm layer thickness. Type: Dimension Condition: used Scope of Delivery: (See image) (Changes and errors in the technical data and information are subject to change!) Chedpfx Aszdnpfsb Deb We would be happy to answer any further questions you may have by phone.

Condition: excellent (used), ProJet 3000 HD 3D Printer Here we offer an untested ProJet 3D printer. The ProJetTM HD 3000 prints precise plastic parts for use in functional tests, as communication models, for rapid manufacturing, rapid tooling, and other applications. With features such as a wide selection of materials, various resolution modes, and ease of use, this office-friendly 3D printer accelerates and maximizes your return on investment (ROI). Printing Modes: HD – High Definition UHD – Ultra High Definition Net Build Volume (xyz) HD Mode: 298 x 185 x 203 mm UHD Mode: 127 x 178 x 152 mm XHD Mode: n/a Resolution: HD Mode: 375 x 375 x 790 DPI (xyz); 32μ layer thickness UHD Mode: 750 x 750 x 890 DPI (xyz); 29μ layer thickness XHD Mode: n/a Accuracy (typical): 0.1 - 0.2% of part dimension Accuracy depends on build parameters, part geometry, part placement, and post-processor settings. Email Notification: No Build Materials: VisiJet® EX200 Build Material: Durable solid material with a long service life VisiJet® SR200 Build Material: Cost-effective multipurpose material. Available in natural, blue, or gray VisiJet® HR200 Build Material: Available in blue, specifically developed for investment casting applications Support Material: VisiJet® S100 Support Material: Non-toxic wax material for melting away the supports without manual intervention Power Supply: 100-127 VAC, 50/60 Hz, single-phase, 15A Dimensions (LxWxH): Printer without packaging 737 x 1215 x 1504 mm Weight: Printer without packaging 254 kg ProJet Accelerator Software: Easy setup of the print job, template and queue management Automatic part placement and machining optimization tools Extensive part file editing tools Automatic support generation Chsdozdnnujpfx Ab Dob Job statistics Network Compatibility: 10/100 Ethernet interface Hardware Requirements: 1.8 GHz with 1 GB RAM (Open GL support 64 MB video RAM) or more Operating System: Windows XP Professional, Windows Vista, Windows 7 Supported File Formats: STL and SLC Ambient Temperature: 18-28 °C Noise Level

Condition: used, functionality: fully functional, Well-maintained Roland VersaUV LEJ-640 UV hybrid printer in good working condition. This versatile printer can print directly onto a wide range of rigid and flexible materials, delivering high-quality, vibrant results with Roland's UV-LED technology. Ideal for signage, promotional products, packaging prototypes, displays, and specialty graphics. The printer has had regular professional maintenance throughout its lifetime and has been operated by a single owner since new. It has been carefully maintained to ensure reliable performance and consistent print quality. Key features: UV-LED hybrid printing technology Prints on both rigid and roll media CMYK + White + Gloss capabilities Suitable for a wide range of substrates Regularly serviced and maintained One-owner machine Chodpfezw U Ubsx Ab Dsb Reliable and proven production printer Available for inspection and test printing. Please contact us for additional information, photos, or pricing.

Condition: like new (used), Year of construction: 2014, operating hours: 100 h, Used ProJet SD6000 3D printing machine using stereolithographic technology. The machine has had extremely low hours usage during its life so far, having been installed and minimally utilised from time to time for research projects at the University of Sheffield AMRC research department known as the “Factory of the Future”. Serial # 10311178101 Year 2014 MACHINE CONSTRUCTION & FEATURES The ProJet 6000 HD SLA 3D provides SLA quality in a compact footprint and is a printer which puts the unmatched capabilities of Stereolithography 3D printing technology, fine-tuned for cost-efficiency and unrivalled material availability, into a smaller footprint. 3D Printed SLA parts with unrivalled accuracy and surface finish. High Flexibility 3D print with fine feature detail in a wide choice of performance engineered materials that match or exceed traditional plastic properties. Easily swap between material modules for flexible use. • Two build platforms • One material delivery cart • Projet TM6000 Print tray • Washing Unit • Curing Unit Csdpstvfwkofx Ab Dohb 3D print with fine feature detail in a wide choice of performance engineered materials that match or exceed traditional plastic properties. Easily swap between material modules for flexible use. Print modes: High Definition, Ultra High Definition Resolution: (HD) 0.125mm, 0.125mm layer. (Ultra-high definition): 0.125mm, 0.10mm layer. Net construction volume: (short) 250 mm x 250 mm x 50 mm (medium) 250 mm x 250 mm x 125 mm, (tall) 250 mm x 250 mm x 250 mm. Accuracy: 0.025 – 0.05 mm per 25.4 mm of part dimension. BENEFITS: Stereolithography technology (SLA) Max build envelope capacity (W x D x H): 250 x 250 x 250 mm (10 x 10 x 10 in). Highest precision and accuracy Exchangeable Material Delivery Modules (MDMs). Utilizing two laser spot sizes per layer – no compromise between speed or feature detail. True line drawing in X and Y to accurately define curves. Industry-leading 3D Sprint software for file preparation and production. Cloud connectivity for predictive and prompt service with 3D Connect.

Condition: as good as new (ex-display), Year of construction: 2026, functionality: fully functional, number of ink cartridges: 4, color channels: CMYK, number of print heads: 8, resolution (max.): 1,200 dpi, number of feeding trays: 1, total length: 2,710 mm, total width: 1,610 mm, total height: 1,875 mm, type of input current: DC, input voltage: 220 V, Installation within the EU included in the price! - Imaging Precision: Industrial 1200 dpi piezo printheads delivering sharp detail reproduction and photographic print quality. - Production Efficiency: Single-pass CMYK technology enabling high-speed production in a single pass. - Application Versatility: Print area up to 251 × 252 mm, allowing decoration of a wide range of publication formats. - Production Consistency: Advanced ink droplet control ensuring consistent color reproduction throughout the entire print run. - Workflow Optimization: Native support for standard file formats (PDF, TIFF), enabling seamless integration with prepress workflows. TECHNICAL SPECIFICATIONS: Model: EdgeR E-60 PRINTING Print method: Single-pass print technology Color: CMYK Codpfjzupndex Ab Dehb Ink type: Water-based pigment ink (CMYK) Printheads: Industrial piezo printheads Resolution :1200 × 1200 dpi / 600 × 1200 dpi Ink droplet size: 7–8 pl Print speed: 1200 × 1200 dpi: 15 m/min; 600 × 1200 dpi: 30 m/min Output capacity: 60 pcs/h MEDIA Media types: Paper, cardboard Media size: Maximum 660 × 470 mm; minimum 450 × 320 mm Maximum printing length: 251 mm Maximum printing width: 252 mm File format: TIFF, PDF, JPG, PNG DEVICE PARAMETERS Dimensions (L × W × H): 2710 × 1610 × 1875 mm Power supply: 1ø AC 220 V, 50 Hz, 5 kW Weight: 1000 kg Operating environment: Dust-free environment, 20–26 °C, 40–60 % humidity

Condition: excellent (used), functionality: fully functional, Year of construction: 2000, type of input current: three-phase, nozzle diameter: 1 mm, Best large scale 3d printer we have ever purchased and has run 4 years without missing a beat, Super reliable with zero failed prints. Cedpfx Abevblu Do Dohb New nozzle and new print bed just installed, ready for new owner.

Condition: excellent (used), functionality: fully functional, Year of construction: 2019, operating hours: 467 h, total length: 840 mm, total height: 1,020 mm, total width: 750 mm, overall weight: 500 kg, input voltage: 400 V, input frequency: 50 Hz, feed length X-axis: 500 mm, feed length Y-axis: 400 mm, feed length Z-axis: 510 mm, space requirement length: 840 mm, space requirement height: 1,020 mm, space requirement width: 750 mm, 3D printer Evotech EL 102 – professional-grade machine with a large build volume. Original price: €60,000. Inspection possible in Upper Bavaria. Only 467 operating hours! For sale: an Evotech EL 102, a professional FDM/FFF 3D printer manufactured in Austria. This machine is ideal for prototyping, small-batch production, and the manufacturing of functional components with the highest quality requirements. Price negotiable. Technical specifications: - Model: Evotech EL 102 - Printing process: FDM/FFF (Fused Filament Fabrication) - Build volume: approx. 500 × 400 × 510 mm - Extruder: 2 independent extruders (dual extrusion) - Nozzles: 0.4 mm standard (replaceable, other sizes optional) - Layer thickness: 0.05 – 0.6 mm - Print bed: heated, PEEK or metal print plate - The print bed is equipped for mounting print plates with a vacuum system. - Automatic print bed calibration before program start. - Materials: ABS, PLA, PETG, PA, PEEK…, technical filaments with CF+GF and support material. - Two independent filament drying chambers for a better and cleaner process. - Print head and drive servos are cooled. - Temperatures: Extruder up to 410 °C, heated bed up to 120 °C, build chamber heating up to 100°C - Software: compatible with Simplify3D, Cura, Slic3r - File formats: STL, OBJ, G-Code - Power supply: 400 V, 50/60 Hz - Dimensions: approx. 840 × 750 × 1020 mm Chsdsztn Dzspfx Ab Dob - Weight: approx. 500 kg Features & Advantages: - Stable all-metal construction for precise continuous operation. - Large, enclosed build volume for demanding materials. - Dual extruder for multi-material and support structures. - Industrial-grade mechanics & control. - Smooth operation, low vibration. - Optimal for research & development, prototyping and small series production. - The first update package was installed during a service. Condition: - Used, very well maintained. - Fully functional and ready for immediate use. Spare parts + consumables as well as various filament types are included. See pictures. Service: - Loading with a forklift possible. - Transport via freight forwarder. - Offered price is net. - Invoice with VAT possible. We are selling because the machine no longer fits into our service portfolio.

Year of construction: 2014, operating hours: 4,000 h, condition: used, Operational machine with low hours! Chsdpey R Dc Defx Ab Dob Ask for additional information!

Condition: good (used), functionality: fully functional, Year of construction: 2016, overall weight: 600 kg, feed length X-axis: 406 mm, feed length Y-axis: 355 mm, feed length Z-axis: 406 mm, Stratasys Fortus 450mc for sale, Contruction year 2016, low operating hours The Stratasys Fortus 450mc is an industrial-grade FDM (Fused Deposition Modeling) 3D printer, widely used in aerospace, automotive, and medical device manufacturing for functional prototypes and end-use production parts. This unit has been operated in a professional production environment and is fully functional. Technical Specifications: Build envelope: 406 x 355 x 406 mm (16" x 14" x 16") Technology: FDM (Fused Deposition Modeling) Layer thicknesses: 0.005"(0,127mm) / 0.007"(0,178mm) / 0.010"(0,254mm) / 0.013"(0,33mm) Number of material bays: 4 - 2 model + 2 support Machine weight: approx. 600 kg Machine running on external Air pressure, to reduce machine noice. Internal air compressor can be purchased and installed. Materials/Licenses: ABS, ASA, PC, PC-ISO, PC-ABS, Nylon12, ULTEM9085, ULTEM1010, Antero. Included: - Fortus450mc + EU Transformer. - Support Removal Wash Unit (German Sonic Cleanstation UW90) Csdpfx Aeznl N Reb Dehb Machine located in Roskilde, Denmark

Condition: used, functionality: fully functional, Year of construction: 2024, operating hours: 268 h, input voltage: 240 V, input current: 12 A, input frequency: 60 Hz, power: 0.6 kW (0.82 HP), We offer this used Zaxe Z3 3D printer, manufactured in 2024. Product name: Zaxe Z3 3D Printer Input voltage: 100 - 120 V and 200 - 240 V Input current: 12 A and 7.5 A Frequency: 50 - 60 Hz Csdszhtilepfx Ab Djhb Power: 600 W Printing time: 268 hours If you have any questions or require further information, please send a message or contact us by phone.

Condition: used, This listing is for 1 of 2 Zebra GK420T Label Printer - Monochrome Chodexv Ag Aopfx Ab Dsb

Condition: used, functionality: fully functional, Year of construction: 2020, total length: 950 mm, total height: 1,360 mm, total width: 700 mm, overall weight: 188 kg, feed length X-axis: 297 mm, feed length Y-axis: 210 mm, feed length Z-axis: 200 mm, We are offering this ready-to-use Keyence AGILISTA-3200W. Chjdpfjy Hmhhox Ab Deb All maintenance has been carried out by Keyence. A full service was recently performed by Keyence, and the printer has been in standby mode since. The printer is in excellent condition. Complete accessory set for immediate operation included: - 1x cartridge of print material - 1x cartridge of support material - 3x waste containers - 1x rinse tank for printed parts - Cleaning kit for parts and printer Viewing by appointment possible. On-site introduction/training available upon request. Technical specifications: - Print material: AR-M2 (transparent print material), AR-H1 (heat-resistant print material), AR-G1L (silicone rubber [low hardness]), AR-G1H (silicone rubber [high hardness]) - Support material: AR-S1 (water-soluble support material) - Build volume: 297 × 210 × 200 mm (DIN A4 size × 200 mm) - Resolution: 635 × 400 dpi - Layer thickness: High resolution AR-M2: 15 µm, standard resolution AR-M2: 20 µm, AR-H1: 20 µm, AR-G1L/H: 30 µm - Interface: Ethernet 10BASE-T / 100BASE-TX - Operation: color touch panel - Dimensions: 95 x 70 x 136 cm - Weight: 188 kg If you have any questions or require further information, please feel free to send us a message or give us a call.

Condition: ready for operation (used), functionality: fully functional, Year of construction: 2024, operating hours: 9,500 h, Keyence MK-G Inkjet Printer – black & white – approximately 2 years old Two Keyence MK-G Inkjet Printers in good condition are for sale. Available: Chjdpezh I Aaefx Ab Dsb 1 black printer 1 white printer Both units are approximately 2 years old, fully functional, and in good, well-maintained condition. The printers were in use until recently and can be made available immediately. Ideal for industrial marking, product coding, and packaging printing. Available immediately. Inspection possible by appointment.

Condition: new, For sale due to printer replacement: Original Kyocera TK-5150 toner cartridges for ECOSYS P6035cdn, M6035cidn, and M6535cidn printers. 3x Black 3x Yellow 2x Cyan Chodpszruuqofx Ab Dob 3x Magenta Sold with invoice against advance payment. Aiming for 60% of the new price.

Condition: ready for operation (used), Mitsubishi K7PRFE printer interface unit, serial number as shown in the photo, complete with connection cable, in a synthetic leather case, used, with normal signs of wear, 100% functional, scope of delivery as shown in the photos. Chedpfxji Eb Nhe Ab Djb

Condition: excellent (used), functionality: fully functional, Year of construction: 2013, overall weight: 2,200 kg, construction height: 500 mm, construction width: 800 mm, No minimum price – guaranteed sale to the highest bidder! The original printer was upgraded to the J4100 type in 2025 with a €135,000 upgrade! It is practically as good as new! TECHNICAL DETAILS Maximum build size: 1,000 x 800 x 500 mm Maximum layer thickness: 27 µm High speed: Up to 3 base resins, 27 m resolution Super-high speed: 1 base resin, 55 m resolution MACHINE DETAILS Power supply: 110 - 240 V Dimensions & Weight Dimensions: 2,870 x 1,960 x 2,105 mm Total weight: 2,200 kg EQUIPMENT Chjdpfx Ajzkvpysb Djb Exchangeable print plate with mobile lifting frame Various spare parts PolyJet UV technology

Condition: excellent (used), Year of construction: 2002, functionality: fully functional, Stack Manzoni Printing Press Stack flexographic printing press with 6 colors. Chjdpfxszxdi Ro Ab Deb Brand: Manzoni. Materials that can be printed: plastic film and paper. Printing options: 6+0, 3+3, 4+2, 5+1. Maximum material width: 1300 mm. Maximum printing width: 1200 mm. Printing repeat length: 400 to 700 mm. Automatic unwinder and rewinder with turret system. Automatic material control system: Rainbow 98P.

Condition: like new (used), Like-new industrial label printer for print-and-apply applications in logistics, shipping, packaging, and production labeling. Manufacturer: Zebra Technologies Type: Industrial label printer Series: ZE500 Model: ZE500-4 Version: Legi-Air 4050 LH Condition: like new Quantity: 1 Serial number: 67J193100183 Printing process: Thermal direct and thermal transfer Print width: up to 104 mm Resolution: 300 dpi Chjdpfx Aozdux Hjb Deb Media width: up to 114 mm Mains voltage: 100–240 V AC Frequency: 47–63 Hz Rated current: 4 A Operation: Front display with keypad Design: OEM print module for print-and-apply systems Ribbon operation: Yes Application area: Shipping labels, pallet labels, product labeling, logistics labeling Manufacturer designation, print module: ZE500-4 Legi-Air system: 4050 LH