Used Heavy-Duty Grilles for sale (5,778)

Condition: used, functionality: fully functional, This used STOW pallet racking system is a compact and high-performance heavy-duty rack designed to meet industrial storage demands. The modular high-bay racking is ideally suited for logistics, industrial facilities, large warehouses, and freight forwarding companies. With a load capacity of up to 2,250 kg per level and a bay load of up to 9,000 kg, this immediately available pallet racking system provides an efficient solution for storing Euro pallets and heavy load units. PRODUCT DETAILS: - Height: approx. 690 cm - Depth: approx. 110 cm - Length: approx. 1,400 cm - Shelf load: 2,250 kg - Beams: approx. 270 x 12 x 5 cm, PNB0472 - Beam color: yellow powder-coated - Uprights: approx. 690 x 110 cm, pre-assembled - Upright color: blue powder-coated - Levels: floor + 3 - Pallet spaces: 60 including floor level spaces - Version: Used STOW equipment SCOPE OF DELIVERY: - 06 x pre-assembled uprights (approx. 690 x 110 cm) - 30 x beams (approx. 270 x 12 x 5 cm) PNB0472 - 60 x locking pins Price: €1,710.00 net €2,034.90 gross A VAT invoice will be provided. DELIVERY, ASSEMBLY & INSPECTION: - Nationwide delivery within Germany by our partner freight company – shipping costs depend on ZIP code - Professional assembly and disassembly by trained teams available as an option - Racking inspections according to DIN EN 15635 by certified inspectors - Inspection of existing heavy-duty racks from other manufacturers also possible PLANNING & CONSULTATION: Our planning department will be happy to provide you with a non-binding offer tailored to your requirements. Whether you need a new installation, conversion, or expansion – we will provide expert advice for your racking configuration. SHOWROOM: Feel free to visit our showroom! On site, you can view a comprehensive selection of our pallet racking, storage racks, and other solutions. Many systems are set up and can be experienced hands-on. Our specialists are available for questions and individual consultation – we look forward to your visit! Haven’t found the right solution yet? Visit our website for a quick overview of a wide range of offers and product variations! INTERESTED OR HAVE QUESTIONS? Contact us easily via message or call. Our phone number is available on our company page. ☎️ We are available by phone Monday to Friday, 8:00 AM – 4:00 PM. Alternatively, send us a message with your name and number and we will get back to you as soon as possible. Cgodpjzbkquefx Af Hju

Condition: used, functionality: fully functional, This used STOW pallet rack is a compact, high-performance heavy-duty racking system designed to meet industrial warehousing demands. The modular high bay racking is ideally suited for logistics centers, industrial applications, large warehouses, and freight forwarding companies. With a shelf load capacity of up to 2,250 kg per level and a bay load of up to 9,000 kg, this immediately available pallet racking system provides an efficient solution for storing Euro pallets and heavy load units. PRODUCT DETAILS: - Height: approx. 1,050 cm - Depth: approx. 110 cm - Length: approx. 1,400 cm - Shelf load: 2,250 kg - Beams: approx. 270 x 12 x 5 cm PNB0472 - Beam color: yellow powder-coated - Frames: approx. 1,050 x 110 cm, pre-assembled - Frame color: blue powder-coated - Levels: Floor + 4 - Pallet positions: 75 including positions at floor level - Version: Used STOW system Codezbkqbspfx Af Hsgu SCOPE OF DELIVERY: - 06 x frames (approx. 1,050 x 110 cm), pre-assembled - 40 x beams (approx. 270 x 12 x 5 cm) PNB0472 - 80 x safety clips Price: €2,080.00 net €2,475.20 gross An invoice with VAT shown will be provided. DELIVERY, INSTALLATION & INSPECTION: - Nationwide delivery within Germany by our partner carriers – freight costs depend on your postal code - Professional assembly and dismantling by trained teams available as an option - Rack inspections according to DIN EN 15635 by certified inspectors - Inspection of existing heavy-duty racks from other manufacturers possible PLANNING & CONSULTING: Our planning department will be happy to prepare a tailored, no-obligation offer according to your requirements. Whether for new builds, conversions, or expansions – we provide expert advice on your racking configuration. SHOWROOM: We invite you to visit our showroom! Here you can get a comprehensive impression of our pallet racks, storage racks, and additional solutions. Many systems are on display and ready for hands-on inspection. Our expert advisors are available for your questions and personal consultation – we look forward to welcoming you! Haven’t found the right solution yet? Visit our website for a quick overview of many offers and product variations! INTERESTED OR HAVE QUESTIONS? Please contact us via message or phone call. You’ll find our phone number on our company profile. ☎️ We are available by phone Monday to Friday, 08:00 - 16:00. Alternatively, send us a message with your name and number and we will call you back as soon as possible.

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: VEB Madix, single-acting short-stroke heavy-duty cylinder type SKF 40 -Stroke: 50 mm Cgedozbiq Hspfx Af Hsu -Lifting capacity: 40 t -Stamp diameter: 100 mm -Dimensions: Ø 145 x 130 mm -Weight: 13.1 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders Codewxtx Djpfx Af Hjgu -Hydraulic cylinder short-stroke heavy-duty cylinder -Stroke: 30 mm -Piston rod: Ø 65 mm -Dimensions: 165/100/H100 mm -Weight: 4.1 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders -Hydraulic cylinder short-stroke heavy-duty cylinder double-acting -Stroke: 30 mm Cgodowuqhzspfx Af Hou -Piston rod: Ø 32 mm -Dimensions: Ø 70 x 165 mm -Weight: 3.6 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders -Hydraulic cylinders short-stroke heavy-duty cylinders -Stroke: 10 mm Cgjdewuqgkopfx Af Hou -Piston rod: Ø 70 mm -Number: 3x cylinders available -Price: per piece -Dimensions: Ø 130 x 37 mm -Weight: 3.6 kg/piece

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: Pfaff, hydraulic cylinder short-stroke heavy-duty cylinder -Stroke: 20 mm -Piston rod: Ø 64 mm -Operating pressure: max. 700 bar -Number: 2x cylinders available -Price: per piece Csdpfx Aewuqdief Hegu -Dimensions: 310/150/H85 mm -Weight: 13.4 kg/piece

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders -Hydraulic cylinders short-stroke heavy-duty cylinders -Stroke: 30 mm -Piston rod: Ø 57 mm Cgedpswt Nv Uofx Af Hju -Dimensions: 103/85/H105 mm -Weight: 4,3 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light metal cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, pressure rams, hydraulic short-stroke cylinders, hydraulic flat cylinders -Hydraulic cylinder short-stroke heavy-duty cylinder 20 t -Stroke: 25 mm -Piston rod: Ø 65 mm Cjdpewt Nvujfx Af Hjgu -Dimensions: 137/100/H100 mm -Weight: 3.4 kg

Condition: used, Craven 2000mm x 8000mm Heavy Duty Lathe Cgjdpox Hp Iwefx Af Hsu 2000mm swing over bed 1500mm swing over saddle 8,000mm between centres Main drive 60kW, 40 ton load capacity Spindle speeds 2 – 152 rpm Steadies 2000mm Bed extension

Condition: used, mileage: 60,068 km, power: 375 kW (509.86 HP), first registration: 08/2016, fuel type: diesel, overall weight: 25,000 kg, axle configuration: 3 axles, brakes: retarder, color: black, gearing type: automatic, emission class: euro6, Equipment: ABS, air conditioning, all wheel drive, crane, navigation system, soot filter, Mercedes-Benz 2551 SZM+HIAB 638 Crane 6x6 and Extendable Schwarzmüller Low-Loader !!! The truck is sold as a complete unit !!! LOF Tractor Unit, Agricultural Tractor Suspension: Leaf-Leaf-Air Wheelbase: 1st to 2nd axle: 1.75 m 2nd to 3rd axle: 4.75 m Payload: 2660 kg Csdpozbfawofx Af Hegu HIAB Crane Type: X-HIPRO 638 E-6 Year: 06.2016 6x Hydraulic extensions with 6x JIB 5x Hydraulic outriggers 1x Remote control 7th + 8th control Schwarzmüller Low-Loader with 3 axles Brake: Drum 3x Steerable axles Length: 7.10 m + 4 meters extendable / Total length: 11.00 m + 4 meters extendable Width: 2.52 m Height from the ground: 0.93 m 2x Outriggers Extra platform Length: 2.97 m Width: 2.47 m Height: 0.50 m Special equipment: Front axle load 9.0 t, Trailer brake 2-line, Trailer socket 12V / 13-pole, Trailer socket 24V / 15-pole, Audio-navigation system Bluetooth Comfort, Step with handrail on the roof, Exhaust pipe raised behind the cab, Exterior mirror right with reversing position, Battery 220 Ah, Compressed air connection in the cab, Compressed air tank aluminum, Electrical pre-wiring in the cab 24V / 100 A, Cab: spring-mounted, Comfort, Suspension: front springs 9.0 t, 4 leaves, Generator 150 A, Gearbox 12-speed - Type: G 330-12, Urea tank (AdBlue): 30 L, Rear lights construction site version, Interior filter construction site vehicles, Air filter: Cyclone air filter, Engine brake reinforced, Auxiliary drive MB 123-10c, Configurable special module, Rotating beacon left/right, Protective plate under the main tank, Circuit breaker, Seats in the cab: Driver's seat suspension seat Comfort, Sun visor outside, Voltage converter 24V / 12V 10 A, Steel rims 10.00x20.0, Storage flap outside left, Socket 24V in the passenger footwell additionally, Stone guard, Turbo-retarder clutch, Additional equipment: Emission standard EURO 6, ABS can be switched off, All-wheel drive permanent, Arocs, Exterior mirrors electrically adjustable and heated, Batteries arranged one above the other, Brake system electronic (EPB) with ABS, Differential lock rear axle, Differential lock front axle, Compressed air unit low, Cab: Width 2.30 m, Cab: Cab entrance movable, Cab: Tilting device hydraulic, Cab: M ClassicSpace, Cab floor with engine tunnel 320 mm, Suspension: Leaf / Leaf, Window lifts electric, Windshield tinted, Rear axle bevel gear 300, Info-display 10.4 cm, Interior filter: Pollen filter, Body/Structure: Tipper, Comfort central locking, Fuel tank: 260 L Aluminum, left, Steering power pump unregulated, Air compressor 2-cylinder, Air dryer heated, Engine 12.8 L - 375 kW R6 Diesel (OM 471), Engine compartment encapsulation, Ramp mirrors, Waste heat recovery, Rear window, Power steering Servotwin, Seat cover / upholstery: Fabric, Seats in the cab: Passenger functional seat, Stabilizer rear axle, Stabilizer front axle, Tachograph / EG control unit, Drum brake front and rear axle, Underrun protection rear fixed, Preparation toll collection, Front axle straight We would also be happy to support you in the area of financing/leasing with our partners. All information without guarantee. Errors and prior sale excepted.

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, adjusting ring cylinders -Manufacturer: Enerpac, short-stroke heavy-duty cylinder, adjusting ring cylinder type HCL 1006 Cgedoktm Egopfx Af Hsu -Pressure force 113 tonnes -Stroke travel: 150 mm -Piston: Ø 200 mm -Operating pressure: max. 700 bar Quantity: 1 piece available -Dimensions: 230/220/H290 mm -Weight: 54 kg

Year of construction: 2009, condition: good (used), Platform trolley, transport trolley, heavy-duty trolley, table trolley, assembly trolley, industrial trailer, container dolly, double turntable steering Codpfsirf Hhjx Af Hsgu -Manufacturer: KTS, heavy-duty transport trolley type DSL with steel tube attachment -Industrial trailer: with 1-axle turntable steering -unbraked, brake not functioning -Platform: intermediate size 2000/800/H605 mm -Load capacity: max 5000 kg -Tires: solid rubber -Maximum speed: 6 km/h -Brake -Trailer coupling: for industrial trailers -Number: 3 transport trolleys available -Price per piece -Total dimensions: 3690/1000/H705 mm -Dependent weight: 460 kg/pc.

Condition: good (used), functionality: fully functional, WE BUY YOUR SHELVES AND ACCESSORIES NATIONWIDE!!! We buy the following products nationwide: *Pallet racks *Industrial shelving *Shelf racks *Cantilever racks *Storage platforms *Drive-in racks Cedpfx Afswhwirj Hegu *Flow racks *Operational equipment *Conveyor systems We can disassemble the racks upon request.

Year of construction: 1988, condition: good (used), Platform trolley, transport trolley, heavy-duty trolley, table trolley, assembly trolley, industrial trailer, container dolly, double turntable steering, heavy-duty trailer -Heavy-duty transport wagon: Industrial trailer with 4-axle turntable steering -Platform: 6100 x 2450 mm -Load capacity: 32 t -Tires: 16 x solid rubber 425/150-305 -Drawbar: reversible, double-sided trailer coupling -Quantity: 1 piece available -Transport dimensions: 2500/7060/H700 mm -Weight: 3500 kg Cgedezavy Eepfx Af Hou

Condition: new, axle configuration: 3 axles, permissible axle load (axle 1): 9,000 kg, permissible axle load (axle 2): 9,000 kg, permissible axle load (axle 3): 9,000 kg, first registration: 04/2026, loading space length: 13,580 mm, loading space width: 2,500 mm, total length: 13,970 mm, total width: 2,550 mm, total height: 2,750 mm, suspension: air, tire size: 385/65-R22.5, wheelbase: 9,010 mm, color: black, Year of construction: 2026, Equipment: ABS, = Additional options and equipment = - Drop sides - BPW axles - EBS - Air suspension - Drum brakes = Remarks = New and unused KASSBOHRER flatbed semi-trailer featuring ABS/EBS, BPW axles with drum brakes, hardwood floor with 12 twistlocks for securing 1x40-foot / 2x20-foot / 1x20-foot central container / 1x30-foot container, 5 stanchion rails spanning the full width, 10 stanchion pockets in the left and right side members, 7 lashing rings on both left and right side members, side walls 80 cm, front wall 155 cm, unladen weight 7,210 kg, permitted total weight: 42,000 kg, year of manufacture 08/2023 = Further information = Axle configuration Tyre size: 385/65-R22.5 Axle brand: BPW DRUM Brakes: drum brakes Suspension: air suspension Rear axle 1: Max. axle load: 9,000 kg; tyre tread left: 100%; tyre tread right: 100% Rear axle 2: Max. axle load: 9,000 kg; tyre tread left: 100%; tyre tread right: 100% Rear axle 3: Max. axle load: 9,000 kg; tyre tread left: 100%; tyre tread right: 100% Csdpfxezadz Ro Af Hsgu Weights Unladen weight: 7,210 kg Payload: 34,790 kg Gross vehicle weight (GVW): 42,000 kg Functionality Body brand: KASSBOHRER MAXIMA XS Maintenance APK (general technical inspection): certified until 04/2027 Condition Overall condition: very good Technical condition: very good Visual condition: very good Further information Please contact Arne Honingh for further information.

Condition: used, total length: 10,300 mm, total height: 4,000 mm, shelf height: 4,000 mm, frame width: 900 mm, This package includes: 4 x uprights, 4m high x 90cm deep 12 x crossbeams, 330cm each including accessories and grating Results in a single row with 3 bays and 2 levels per bay, total length approximately 10300cm 400m available immediately! Manufacturer: Galler Type: Wide-span shelving Condition: used, good Height: 4 m Length: approx. 1 x 10.30 running meters Frame depth: 0.90 m Construction: Plug-in system Shelf load: 1200 kg per shelf Accessories such as: Floor fixing Connectors Load warning signs Impact protection Guardrails Grated flooring Rear panel grating Depth stops Barrier railings Csdozavi Hjpfx Af Hegu and much more... Just ask us! Sales & Delivery Terms (B2B) - Prices & Logistics: All prices are quoted net ex warehouse. Express delivery via our own fleet is possible after individual agreement. - Offer Status: All offers are subject to change and non-binding. Subject to prior sale. - Reservation of Ownership: The goods remain our unrestricted property until full payment is received (no right of disposal or processing). - Warranty: Exclusive sale to commercial enterprises (§ 14 BGB). No warranty for defects in used and IIa goods. The respective manufacturer's warranties apply to new goods.

Condition: used, load capacity per storage section: 4,000 kg, total length: 3,600 mm, This package includes: 1 x IPE120x60 beam, 3,600 mm Manufacturer: SSI Schäfer Type: PR 600 Condition: used, good condition Beam length: 3,600 mm Height: 120 mm Bearing width: 60 mm Cgedpfx Afezavh Aj Hju Color: blue Load capacity: 4,000 kg Accessories such as: Floor mounting Connectors Load warning signs Impact protection Guardrails Grating Rear wall grating Deep stringers Barrier railing and much more... Just ask us! Sales and Delivery Conditions (B2B) - Prices & Logistics: All prices are quoted net ex works. Express delivery via our own fleet is possible upon individual agreement. - Offer Status: All offers are subject to change and availability. We reserve the right to sell items prior to confirmation. - Retention of Title: Ownership of the goods remains with us until full payment has been received (no right of disposal or processing). - Warranty: Exclusive distribution to commercial enterprises (§ 14 BGB). For used and IIa goods, liability for defects in materials is excluded. For new goods, the respective manufacturer's warranties apply.

Condition: used, load capacity per storage section: 3,000 kg, total length: 2,700 mm, total height: 100 mm, 1 x Traverse IPE100x50, 2,700mm Condition: used, good condition Traverse length: 2,700mm Height: 100 mm Bearing width: 50 mm Color: green Rated load: 3,000kg Accessories such as: Floor mounting Connectors Load warning signs Impact protection Guardrails Grating Rear panel grating Deep webs Barrier railings and much more... Just ask us! Sales & Delivery Terms (B2B) Csdpjzavg Ejfx Af Hjgu - Prices & Logistics: All prices are quoted net ex works. Express delivery via our own fleet is possible after individual consultation. - Offer status: All offers are non-binding. Subject to prior sale. - Reservation of ownership: The goods remain our unrestricted property until full payment (no right of disposal or processing). - Warranty: Exclusive distribution to commercial enterprises (§ 14 BGB). For used and IIa goods, liability for defects in materials is excluded. For new goods, the respective manufacturer's warranties apply.

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: Yale, hydraulic cylinder with spring return, single-acting, 100 mm stroke -Type designation: YS-23/100 -Piston rod: Ø 42 mm -Lifting capacity: 23 t -Operating pressure: max. 700 bar -Number: 3 cylinders available Price: per piece -Dimensions: 150/85/H195 mm Cgedpfswtmznex Af Hou -Weight: 7 kg/pc.

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: Lukas, single-acting light alloy cylinder with spring return, 50 mm stroke -Type designation: HP 20/50 Codpfswtm H Djx Af Hogu -Stamp diameter: 65 mm -Lifting capacity: 20 t -Number: 2 cylinders available Price: per piece -Dimensions: 140/100/H205 mm -Weight: 6.1 kg/pc.

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders Csdpowxtt Iofx Af Hegu -Manufacturer: Lukas, single-acting light alloy cylinder with spring return, 50 mm stroke -Type designation: HP 50/50 -Stamp diameter: 112 mm -Pressure: max. 450 bar -Lifting capacity: 50 t -Dimensions: 220/160/H220 mm -Weight: 19 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: Lukas, single-acting light alloy cylinder with spring return, 50 mm stroke -Type designation: HP 50/50 Cgjdswxtv Aspfx Af Hju -Stamp diameter: 110 mm -Lifting capacity: 50 t -Dimensions: 220/165/H220 mm -Weight: 19.5 kg

Condition: good (used), Short-stroke heavy-duty cylinders, high-pressure hydraulics, compact cylinders, light alloy cylinders, high-pressure cylinders, universal cylinders, hydraulic cylinders, straightening cylinders, hydraulic rams, hydraulic pressure cylinders, lifting cylinders, hydraulic short-stroke cylinders, hydraulic flat cylinders -Manufacturer: FAG, single-acting light alloy cylinder with spring return, stroke 210 mm -Type designation: LZM 25/200 PN500 8607 Cjdpfx Afjwxtw To Hjgu -Stamp diameter: 63 mm -Lifting capacity: 25 t -Pressure range: max. 500 bar -Dimensions: 140/110/H365 mm -Weight: 12 kg

Condition: good (used), Platform trolley, transport trolley, heavy-duty trolley, table trolley, assembly trolley, industrial trailer, container dolly, double turntable steering, heavy-duty trailer -Heavy-duty transport wagon: Industrial trailer with 4-axle turntable steering -Platform: 6100 x 2450 mm -Load capacity: 30 t -Tires: 32 x solid rubber 415/100-305 -Drawbar: reversible, towbar coupling on both sides, drawbar extension -Quantity: 1 piece available -Transport dimensions: 7280/2500/H750 mm -Weight: 4000 kg Csdpfx Ajzakcnef Hegu