Used Forklift With Stone Stacking Clamp for sale (21,465)

Condition: ready for operation (used), functionality: fully functional, machine/vehicle number: M11360*17766, Year of construction: 2018, load capacity: 12,000 kg, lifting height: 6,500 mm, The technical data are taken from the original order confirmation. The seller cannot guarantee that these correspond to the current condition. TECHNICAL DETAILS Lifting capacity: 12,000 kg at a load center of 1,200 mm Mast: Duplex standard Lift height: 6,500 mm Collapsed height: 4,895 mm Extended height: 8,100 mm Tilt: 5° forward / 10° backward MACHINE DETAILS Dimensions (L x W x H): 5,205 x 2,550 x 2,905 mm Wheelbase: 3,500 mm Engine: Volvo TAD-871-VE / 6-cylinder / eco-friendly engine with CAN bus (EU Stage IV), 185 kW at 2,200 rpm, 1,160 Nm, displacement 7.7 L STEINWEG Stone Stack Grab Type HG1T-6000S TECHNICAL DETAILS Clamping range: 0.96–1.00 m Opening range: approx. 0.6–1.3 m Clamping height: 1.3 m Lifting capacity: 6,000 kg Double clamp bars: 1 pair, with cushioned plastic jaws, length 2.3 m Mounting: Pendulum suspension EQUIPMENT Manufactured in a robust and clean welded construction Splayed clamp arms mounted rotatably With hydraulic cylinders, required valves, pipes, and fittings Including oil pressure manometer and connection hoses to the rotator Additionally: one pressure gauge mounted 180° opposed to the standard manometer LIFTING ARM & EXTENSION TECHNICAL DETAILS Extension: 1.6–2.1 m Lifting capacity: 8,000 kg at an outreach of 1.6–2.1 m EQUIPMENT 1 piece forklift lifting arm, twin beam, with endless rotator and pendulum suspension Including connection hoses to forklift 1 piece hydraulic extension with telescopic cylinder 1 stabilizer (2 pcs) for pendulum motion compensation Integrated side shifter in slide guides, travel: 250 mm RADIO PRESSURE MONITORING (Clamping Pressure) Radio frequency: 868.4 MHz Ambient temperature range: -30°C to +85°C Power supply: Lithium battery 3.6 V Battery life: approx. 1 year at 5-second intervals EMC System / Cabin & Operation EMC system: Electronic control with 7" touch screen Driver's seat: BeGe 9100 Cabin: OPTIMA – ergonomic safety comfort cabin High noise and vibration damping Hydraulically tiltable to the side ADDITIONAL EQUIPMENT Front mud flaps Rear mud flaps Exterior mirrors on fender (high) Turbo II heavy-duty air filter Additional hydraulic functions Quick couplings on the fork carriage Accumulator/vibration damper 60 bar / 2 L in the lifting function Hydraulic oil tank pre-heating Additional LED headlights, 2 × on the mast Reversing alarm LED beacon Electrical cables over the mast Power connection 400 V, 3-phase Blue Spot front and rear EMC 107 electronic weight display (0.1 t) EMC 114 electronic joystick with RPM increase EMC 122 speed limiter 20 km/h, switchable to 15 km/h Electric seat heating DAB/analog radio incl. Bluetooth, MP3, AUX, USB, 2 speakers Intermittent wiper ACC air conditioning SMV universal mounting rail Movable A4 writing pad LED reading lamp Diesel parking heater + engine water heater Sun visor (roof/front) Dedpfx Aoy T Edhjixsuu Panorama rearview mirror Preparation for attachments from other manufacturers Central lubrication base, 14 points

Condition: new, functionality: fully functional, Year of construction: 2025, load capacity: 3,500 kg, lifting height: 6,000 mm, fuel type: electric, HT-30 Electric Forklift with Clamp — 3.5T / 6m Lifting Height The HT-30 is a robust, high-performance electric forklift engineered for demanding warehouse and industrial environments where precision high-level lifting is required. Its construction features a rigid 120 mm H-section steel mast, providing outstanding stability and long-term durability in any operating condition. Dujdpoyymkiofx Aixsu Key Specifications: - Lifting capacity: 3,500 kg - Three-stage mast with a lifting height of 6 metres - Fork length: 1,220 mm - Integrated carrying clamp Powertrain & Drivetrain: - 10 kW AC lifting motor - 7.5 kW AC drive motor - Highly wear-resistant solid tyres for extended service life Safety & Comfort Features: - LED work lights, left/right turn indicators, brake lights, and driving lights - LCD instrument panel - Electric horn - Operator seat belt The three-stage mast and 6-metre lift make this forklift ideal for high-bay storage applications. The AC drive system ensures minimal maintenance, regenerative braking, and smooth, precise load handling. The integrated carrying clamp increases versatility for handling non-palletised goods such as rolls, drums, or bales. Condition: New Availability: In stock

Condition: ready for operation (used), Year of construction: 2021, load capacity: 1,400 kg, Brand: KAUP Model: 4.5T413 Year of manufacture: 05/2021 Load capacity: 1400 kg Djdpfxezbrk As Aixsuu Widest opening distance: 168.5 cm FEM 2 Condition: very good

Condition: good (used), Year of construction: 2017, operating hours: 15,940 h, load capacity: 3,500 kg, lifting height: 6,040 mm, fuel type: electric, mast type: triplex, construction height: 2,725 mm, empty load weight: 5,500 kg, mileage: 15,940 km, TRIPLEX forklift brand STILL, year 2017, capacity of 3,000 kg; Lifting height of 6,040 mm; Equipped with FREELIFT; Equipped with SIDESHIFT; Clearance height 2,725 mm; Equipped with Cascade clamp; Clamp dimensions: 219 mm inner width; 150 mm height; 130 mm width; 200 cm height with bracket; clamps up to 41 cm; NON-MARKING tires; Battery from 2019 with external charger; Automatic filling system; Schedule an appointment for a test drive; Video coming soon. Dodpex A Ev Hefx Aixeuu

Condition: used, Electric Forklift, Micro Forklift STILL Type RX 50-10L Micro Compact Forklift Serial No. 515061C00057 Year of manufacture 2012 Load capacity: 1000 kg Lift height: 4900 mm Fork length: 1200 mm Fork carriage width: 980 mm Overall height: 2160 mm Operating voltage: 24 Volt - Triplex mast with full free lift 1550 mm - Hydraulic side shifter - NEW BATTERY from year 7/2025, type 5 PzS 625 (24 Volt / 625 Ah) - Power steering - Automatic charger TRICOM XL, 24 Volt 120 Ah Djdjw T U Dcepfx Aixjuu - 3-wheel solid rubber tyres, white, 180/70-8 - 2 front work lights - 1 rear work light - Blue safety warning light for reverse travel - 11,702 operating hours according to the hour meter - New TÜV safety inspection UVV (surcharge 150 EUR net) Length without forks: 1680 mm Total width: 1040 mm Own weight without battery: approx. 2157 kg Own weight with battery: approx. 2620 kg Good condition

Condition: used, Electric pedestrian stacker, low-floor pallet truck, ant, pedestrian stacker JUNGHEINRICH type EME 112 Machine no. No.: 90145339 Year of construction 2005 Dusdpfx Aiju Emggexeu Rated capacity: 1200 kg Lifting height: 200 mm Fork length: 1170 mm Operating voltage: 24 Volt Total length: 1550 mm Overall width: 700 mm Overall height with drawbar: 1300 mm - 2 drive batteries NEW from year of manufacture 2024, type 12 Volt, Ah 55 - integrated automatic charger, type E 230 G 24/6 (24 Volt, 6 Ampere) Weight: approx. 175 kg good condition

Condition: used, REF: MM6436 Chinese 4-head filler with gating system and touch-screen controls. Valves capable of hot filling. Previously used for filling a 500ml syrup product, potentially 250-1000ml range. Dsdpoza T I Hofx Aixjuu Electric requirements - 240V / 50 hz / 1 ph. Belt - 82mm. Overall dimensions - 2100mm long x 1030mm wide x 1950mm high. Will need guarding to meet CE spec.

Condition: excellent (used), Year of construction: 2006, Dimension: 2650 x 2100 x 2100 mm Clamping Force: 635 KN Working pressure: 206 bar Piston diameter: Ø200 mm Stroke: 140 mm Daylight: 150/180 mm Heating plant dimension: 250 x 300 mm Max. mass of heating plant: 70 kg Oil reservoir: 100 l Rated power: 19.66 kW Heater capacity: 9.6 kW Vacuum motor power: 2,6 kW Between light curtain and mould area: 270 mm Stroke of vacuum cover: 140 mm The vulcanizing press from manufacturer PAN STONE, model S-V-65-2RT-PCD, was used by a renowned German company specializing in sealing technology and electromobility. This company is known for its high quality and innovation in seal production. Djdpfx Aijzacd Rjxeuu The machine was part of a production line responsible for manufacturing high-performance seals used in various industries. It was always professionally maintained and repaired, which explains its excellent condition. This press offers you the opportunity to invest in proven technology that was utilized by a leading company in Germany.

Condition: used, Year of construction: 2005, functionality: fully functional, Clamping force: 4900 kN Working pressure: 206 bar Heating plate dimensions: 700 x 700 mm diameter of piston: 558,8 mm max. stroke: 250 mm daylight: 300 mm max. mass of heating plant: 560 kg capacity of oil tank: 1100 l Djdpozacb Nsfx Aixouu rated capacity: 82 kW heating capacity: 56 kW enginge output, vacuum motor: 4 kW Stroke of vacuum cover: 200 mm dimensions: 3975 x 2935 x 2555 mmm Equipped with a crane runway (monorail) with three chain hoists Producer: STHAL Year: 2011 Lifting capacity: 3 x 400 kg Lenght of crane runway: ca. 3500 mm Rolling chassis Lifting capacity: 400 kg Lifting height: 3000 mm stroke speed - main stroke: 4 m/min stroke speed - fine stroke: 1 m/min The vulcanizing press from manufacturer PAN STONE, was used by a renowned German company specializing in sealing technology and electromobility. This company is known for its high quality and innovation in seal production. It was always professionally maintained and repaired, which explains its excellent condition. This press offers you the opportunity to invest in proven technology that was utilized by a leading company in Germany.

Condition: good (used), Perfecta BSB 3L Paper Jogger with Roller The machine is 100% functional and in perfect condition. This is the latest design from a German manufacturer. Year of manufacture: 2016. Technical specifications: Dsdpfxoy Sd T Es Aixouu Maximum format: 1150x900mm Stack height: 160mm Weight: 550kg Power supply: 400V Air squeezing roller Air table with micro-perforation Tilt angle adjustment Jogging frequency adjustment (inverter) Adjustable force and speed of the air squeezing roller. Chrome-plated table surface Full documentation set.

Condition: refurbished (used), Year of construction: 2015, Durst P10-200 with Corrugated Option, fully automatic Resolution: 10 pl - 1000 dpi Color: 6C + (optional White) Very low usage Speed up to 2025 m2/h Fully automatic loader (feeder) Fully automatic unloader (stacker) INK: Paper and board with very low odor Options: Corrugated Option with 2 rails for dropping down material Corrugated static bar for different material thicknesses Corrugated software to control media and thickness - Understatic bar and automatic media stop for crash prevention - Caldera Rip Software Demo video is from Durst Rho 750 (28 pl, 600 dpi) Dusdey Amckjpfx Aixsu

Condition: used, Load capacity: 3 t Opening width: 38 mm Dujdsb Nwkxjpfx Aixsu Weight: 15 kg

Condition: good (used), Saxon Bag Sealer With Reverse Facility With Top Bag Cutter Djdsv Dm Epjpfx Aixeuu With Hydraulic Lift Mast Stainless Steel 230 Volt Power Supply

Condition: good (used), Saxon Bag Sealer Stainless Steel With Stainless Steel Conveyor 230 Volts Single Phase Power Dedpfxsv Dm Dle Aixouu Height adjustable mast Mobile on castors Fixed adjustable feet also Conveyor belt dimensions 1500mm L x 400mm W

Condition: excellent (used), Year of construction: 2016, Loma Systems Metal Detector with Rejector Model: IQ³ Duodpfx Asv T Ah Esixeu Model conveyor: MD Conveyor, serial number: G7B3C2RS-35150D Year of construction: 2016 220-240 V, 1 Ph, 50/60 Hz, 3 A Belt width: 300 mm, clearance: 350 mm x 150 mm Total dimensions: 2020 mm x 1080 mm x 1120 mm

Condition: good (used), Floor weighing scale K-PZ Weigher indicator Type: KPZ 52E-9-1 Maximum weight: 300 kg Minimum weight: 2 kg, e=: 0.1 kg, T=- 300 kg Djdpfx Aox Hz Dqsixsuu Dimensions: 800 mm x 1100 mm x 100 mm Including ramp

Condition: new, New Conveyor with overhead feeder hopper Dusdpfxowd Nthe Aixsu Both units are mobile on castors Feeder hopper with opening end door, adjustable exit gate to conveyor Feeder hopper dimensions 800mm x 740mm x 600mm deep Conveyor belt dimensions 1800mm x 230mm W x 1260mm H Conveyor height is adjustable VFD on conveyor drive

Condition: used, Year of construction: 2020, Orangeworks Stainless Steel Mixer Tank Qty 2 in stock Capacity 500 LTS Load cells Mixer Dedowq Sz Uepfx Aixsuu Ancillary equipment included

Condition: used, This listing is for the Stuart SSM1 Mini Orbital Shaker with holder Duedpexv A Nqsfx Aixsu The unit is in full working condition and is ready for immediate release The Stuart SSM1 Mini Orbital Shaker is a compact and versatile laboratory shaker designed for gentle orbital mixing. It features a 16 mm orbital motion, variable speed control up to 300 rpm, and a built-in digital timer with settings ranging from 1 second to 999 minutes or continuous operation. The shaker is supplied with a non-slip mat suitable for holding up to four multi-well plates or diagnostic cards. It can operate in incubators and environmental chambers with temperatures up to 40°C and 80% relative humidity. ​

Condition: new, Year of construction: 2026, functionality: fully functional, CONSTMACH secondary impact crushers set the standard in rock crushing machine technology with their high efficiency and superior crushing performance. These crushers are specifically designed to meet high-capacity production needs. Thanks to their robust body structure and optimized rotor design, they deliver a perfect cubic-shaped final product even with hard and abrasive materials. The three-stage pendulum system allows primary, secondary, and tertiary crushing operations to be performed on a single machine. This minimizes time loss in the production process while maximizing efficiency. High chrome or manganese alloy cutting bars offer long life and low maintenance costs. The hydraulic opening system maximizes operating time by facilitating maintenance and part replacement. CONSTMACH secondary impact crushers offer a reliable solution for any rock crushing plant thanks to their high reduction ratio and wide discharge opening. Secondary Impact Crusher Technical Specifications CSI-1210 Rotor Diameter: 1,100 x 1,100 mm Maximum Feed Size: 200 mm Production Capacity: 60 - 100 t/h Motor Power: 160 kW Weight: 17,500 kg CSI-1212 Rotor Diameter: 1,100 x 1,250 mm Maximum Feed Size: 250 mm Production Capacity: 120 - 150 t/h Motor Power: 200 kW Weight: 21,500 kg CSI-1215 Rotor Diameter: 1,100 x 1,500 mm Maximum Feed Size: 350 mm Production Capacity: 200 - 250 t/h Motor Power: 250 kW Weight: 26,000 kg Dedpsxqgtijfx Aixjuu Why Choose CONSTMACH Secondary Impact Crushers? CONSTMACH prioritizes quality and durability in the production of stone crushing machines. Our secondary impact crusher models reduce operating costs with their long-lasting components, low maintenance requirements, and high performance. They offer guaranteed uninterrupted operation with an extensive service network and easy access to spare parts. Each model is designed to suit different production capacities, providing the most suitable solution for your facility. With reliable engineering, high production standards, and a customer-focused service approach, CONSTMACH is always one step ahead in the stone crushing industry. What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting performance.

Condition: new, functionality: fully functional, Year of construction: 2026, CONSTMACH primary impact crushers are among the most preferred solutions among rock crushing machines, offering high efficiency and superior crushing performance. They deliver excellent results in crushing soft and medium-hard rocks, limestone, marble, and similar materials. These crushers enable a high percentage of cubic product to be obtained thanks to their powerful rotor structure and optimized impact plates. This feature ensures that the final product is superior in terms of both quality and granulometric homogeneity. Thanks to the hydraulic adjustment mechanism, adjustments can be made quickly and safely. In addition, there is minimal time loss during maintenance. The durable body structure, manganese-lined inner surfaces that provide protection against wear, and wide feed opening guarantee long-lasting use and high performance. With all these features, primary impact crushers increase production capacity by reducing the need for secondary crushing in plants and lower operating costs. Primary Impact Crusher Technical Specifications MODEL: CPI – 1412 Rotor Diameter: 1,400 x 1,250 mm Maximum Feed Size: 900 x 900 mm Production Capacity: 200 – 250 t/h Motor Power: 250 kW Weight: 23,000 kg MODEL: CPI – 1415 Rotor Diameter: 1,400 x 1,540 mm Maximum Feed Size: 1,000 x 1,000 mm Production Capacity: 350 – 400 t/h Motor Power: 315 kW Weight: 28,000 kg MODEL: CPI – 1620 Rotor Diameter: 1,600 x 2,000 mm Maximum Feed Size: 1,300 x 1,300 mm Production Capacity: 400 – 600 t/h Dusdpfoxqgypex Aixsu Motor Power: 2 x 250 kW Weight: 52,000 kg Why Choose CONSTMACH Primary Impact Crushers? CONSTMACH has proven its reliability with crushing and screening equipment manufactured to high engineering standards. Our Primary Impact Crusher models are designed for different capacity and application needs. Each one undergoes tested quality control processes and offers long-lasting use. In addition, thanks to our after-sales technical support, spare parts supply, and fast service advantages, you will get a return on your investment for many years to come. If you are looking for high performance, durability, and low maintenance costs, the CONSTMACH rock crushing machine series is the right choice for you. What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products tailored to their needs. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting performance.

Condition: new, functionality: fully functional, power: 75 kW (101.97 HP), color: other, Year of construction: 2026, Equipment: ABS, CONSTMACH jaw crushers are designed to offer high durability and superior crushing performance, making them ideal machines for primary crushing operations in quarries and mines. They have the capacity to process a wide range of materials, from the softest limestone to the hardest types of granite and basalt. Their robust construction, high flywheel torque, and special jaw geometry ensure high-efficiency crushing of material into uniform sizes. The advanced hydraulic adjustment mechanism allows for easy adjustment of the desired output size and minimizes operator intervention. CONSTMACH jaw crushers ensure long-lasting use with their forged chrome-nickel steel pitman structure, heavy-duty bearings, and automatic lubrication systems. The welded main frame, which has undergone thermal stress relief treatment, maintains maximum durability even under high vibration. The user-friendly maintenance design provides an uninterrupted and safe working environment during production processes. These machines can be integrated into stationary or mobile crushing plants, offering high flexibility for projects. Dsdpoxqf Swefx Aixsuu CJC-90 Technical Specifications Mouth Size: 900 x 650 mm Motor Power: 75 kW Shaft Speed: 277 rpm Weight: 11,400 kg Min./Max. Adjustment: 50 - 150 mm Production Capacity: 90 - 270 t/h Why Choose CONSTMACH Jaw Crushers CONSTMACH is a symbol of quality and reliability in crushing and screening technologies. Each jaw crusher model undergoes production processes that comply with international standards, ensuring maximum performance, low operating costs, and a long service life. With customizable design options tailored to customer needs and an extensive service network, it supports your business's uninterrupted production goals. In terms of reliable performance, engineering quality, and after-sales technical support, CONSTMACH is the right choice for crushing systems. What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, stone crushing machines, stone crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting performance.

Condition: new, functionality: fully functional, Year of construction: 2026, CONSTMACH tertiary impact crusher is an advanced crushing machine that provides high efficiency in rock crushing and sand making processes. It delivers superior performance, especially in crushing medium-hardness materials with low abrasive properties. This machine stands out with its ability to produce fine, cubic-shaped material down to 0.5 mm in a single pass. It is an ideal choice for producing high-quality aggregate in sectors such as construction, ready-mix concrete production, and asphalt applications. Tertiary crushers ensure that the material is produced in homogeneous sizes during the crushing process and enable more efficient utilization of the material thanks to their high reduction ratio. With these features, the CONSTMACH tertiary crusher is also frequently preferred as a “sand making machine” in stone crushing plants. Thanks to its high-speed rotating rotor system and adjustable crusher plates, the material can be crushed to the desired fineness. The hydraulic opening and adjustment mechanism allows operators to perform maintenance and replacement operations safely and quickly. Replaceable wear parts ensure long-term use and low operating costs. Furthermore, its design, suitable for operation in closed-circuit systems, provides consistent quality across different product sizes. Tertiary Crusher Technical Specifications MODEL: CTC - 1275 Rotor Diameter: 1,100 x 750 mm Rotor Speed: 800 - 900 rpm Maximum Feed Size: 100 mm Capacity: 60 - 80 t/h Motor Power: 110 kW Weight: 9,500 kg MODEL: CTC - 1210 Rotor Diameter: 1,100 x 1,000 mm Rotor Speed: 800 - 900 rpm Maximum Feed Size: 120 mm Capacity: 80 - 135 t/h Motor Power: 160 kW Weight: 12,500 kg Dsdexqgtvepfx Aixsuu MODEL: CTC - 1212 Rotor Diameter: 1,100 x 1,200 mm Rotor Speed: 800 - 900 rpm Maximum Feed Size: 150 mm Capacity: 120 - 170 t/h Motor Power: 200 kW Weight: 15,500 kg MODEL: CTC - 1215 Rotor Diameter: 1,100 x 1,500 mm Rotor Speed: 800 - 900 rpm Maximum Feed Size: 150 mm Capacity: 230 - 250 t/h Motor Power: 250 kW Weight: 18,500 kg Why Choose CONSTMACH Tertiary Crushers CONSTMACH offers reliable solutions in crushing, screening, and concrete production equipment that meet international standards. Our tertiary impact crushers increase your operation's production efficiency with high quality, durability, and low maintenance costs. We are always by your side during the after-sales process with our spare parts and technical support services. If you are looking for a long-lasting, energy-efficient, and high-performance stone crushing machine, CONSTMACH is the right choice for you. What Do We Do at Constmach? Constmach is a leading machine manufacturer serving the construction and mining industries with a wide range of products. Our product portfolio includes concrete block making machines, stationary and mobile concrete plants, rock crushing machines, rock crushing and screening plants, sand washing machines, sand making machines, asphalt plants, conveyor belt systems, jaw crushers, and mobile crushing plants. With its high quality standards, innovative production approach, and customer-focused solutions, Constmach stands out as a reliable brand in both national and international markets. Our products continue to be the preferred choice of industry professionals due to their durability, efficiency, and long-lasting performance.

Condition: used, Sheet metal clamp, sheet metal claw, beam clamp, beam claw, sheet metal gripper, material gripper, material gripper -with chain: 1.3 m -Span width: 44 to 70 mm -Load capacity: 6300 kg Djdpjd Hb Imjfx Aixouu -Dimensions: 300/460/H120 mm -Weight: 30 kg

Condition: used, Labeling machine for top and bottom, with a ZODIAC printer for the top labels. Djdpfsyaqttox Aixjuu