Heavy duty polyurethane iron core casters have many advantages, such as: high strength, good toughness, wear resistance, long life and other characteristics. They can be used in harsh environments and can meet the application requirements in different fields. Product Details - Name: heavy duty industrial transportation casters wheel - Material: polyurethane heavy duty steel - Type: fixed casters swivel casters brake casters - Usage: trolley, tool box, light machinery, equipment carriers, storage box, DIY, workbench, furniture, etc. Dimensions - Wheel Diameter: 100mm 125mm 150mm 200mm (4in 5in 6in 8in) - Wheel width: 50mm (2in) - Mounting height: 142mm 165mm 191mm 240mm (5.6in 6.5in 7.5in 9.4in) - Frame thickness: 6mm (0.23in) - Top plate size: 115mm x 100mm (4.5in x 4in) - Mounting hole spacing: 84mm x 71mm (3.3in x 2.8in) Load capacity (upper limit) - Single wheel: 300kg 350kg 400kg 450kg (660lb 770lb 880lb 990lb) - 4 Wheels: 900kg 1050kg 1200kg 1350kg (660lb 770lb 880lb 990lb) Package Contents - Heavy duty industrial casters × 4 - Stainless steel M10×50mm bolts × 16 Attention. - ! - The casters are only suitable for human propulsion, prohibit the use of automobile or electric vehicle traction - The load capacity of 4 casters is the sum of the load capacity of 3 castersUSE FOR MULTIPLE USES: These castor wheels are perfect for so many different uses. Use them for industrial shelving, storage units, toolboxes and work saw benches. You can use them around the home for furniture such as kitchen islands, desks, ottomans, toy shoe bins, outdoor planters, shelves, coffee tables, chairs, and cabinets. Additionally, use them for display exhibition equipment, flight instrument cases, dollies, speakers, and many different types of machinery equipment. ? Multi-purpose silent casters are widely used in logistics, medical, laboratory, factory, warehouse, supermarket, home. Industrial use. Replacement wheels for trolleys, workbenches, furniture, machinery and equipment, perfect for DIY enthusiasts!. ? Heavy duty casters 4-piece set, wheel diameter 100 125 150 200mm mounting height 142 165 191 240mm single wheel load capacity: 300 350 400 450kg, four wheels with strong load capacity: 900 1050 1200 1350kg. ? industrial transportation casters with 6mm thick heavy-duty steel bracket and solid steel wheel hub, durable, stable and pressure-resistant, strong load-bearing capacity and long service life. Top with 115mm x 100mm mounting plate, pre-drilled for easy installation. ? polyurethane casters, moving quietly, shock absorption, wear-resistant, impact resistance, strong ability to cross barriers. Wheel surface width of 50mm, better smooth movement on the road, and does not hurt the floor, does not leave scratches.