Feature 1Double Wheel Design: 360 degree rolling wheel adopts double wheel design, the double wheel force is more even, and the casters are more stable and durable. 2Load Bearing: The capacity of each caster is about 8.75kg/19.29lb, the total capacity of 4 casters is 6.25kg/57.87lb (calculated by 3 casters). Because when the floor is uneven, sometimes only 3 casters will bear the weight. 3Scope of Application: Caster wheels can be used as a set of replacement furniture wheels for desks, cabinets, flower pot shelves, storage cabinets, shelves, shoe racks, etc. 4Wide Application: Furniture caster wheels are suitable for wood floor, tile floor, marble floor, cement floor, mud floor or carpet. 5ABS and Metal: Rolling wheels are made of ABS and metal, wear resistant and durable, not easy to damage, can be used for a long time.SpecificationItem Type:SwivelCasterWheelsMaterial: ABS, MetalSpecification: 4pcsPulley Screw Diameter: Approx. 7mm / 0.3in Package List4 x Wheel4 x Spacer