4" x 2" Caster Wheels, 1/2" Bore Axle Heavy Duty Industrial Wheels, Polyurethane on Cast Iron Wheel, Set of 4 Replacement Wheels for Cart Toolbox (4 Wheel)

Polyurethane on Cast Iron: Heavy duty wheels are composed of non-marking polyurethane tread and then cast upon an cast iron core. 4 wheels offers higher weight capacities while providing good floor protection and a smooth quiet rolling operation. | Caster Wheel Diameter: 4"/5"/6"/8", Wheel Tread Width: 2". Axle Bore: 1/2", Hub Length: 2-7/16", Bearing Size: Roller Bearing. | Load Capacity: 4": 800lbs per wheel; 5": 1000lbs per wheel; 6": 1200lbs per wheel; 8": 1500lbs per wheel. Shock absorbing cushioned slide offers floor protection. | Smooth-Running Wheels: Built in Roller Bearing & Spanner Bushing make the caster wheels rolling smoother and quieter. Reduced friction allows for a longer lifespan of the caster wheels. | Widely Used: Industrial caster wheels heavy duty are mainly used in outdoor or indoor. Widely used in tool box, workshop table, steel table, dolly, workbox, dumpster, trolley, institutional equipment and cart.