Heavy Duty Ball Wheel: Made of PP/PU and steel, very strong and durable swivel. 30kg (66lb) capacity per caster, 40mm (2in) diameter ball-shaped casters. Smooth and Quiet: The precision ball bearing of the antique caster movement is smooth and smooth. 2 inch furniture casters are designed to protect hardwood, laminate, tile, slate and all other low-pile carpets or other non-sensitive floor coverings. Wide Application: These hooded casters are ideal for small sofas, chairs, ottomans, benches, TV stands, microwave carts, plant stands, shoe boxes, toy boxes and other small furniture. < br> Specifications: Main Material: Polyurethane/Plastic, Metal Stem Diameter: 8mm x 38mm (5/16" x 1 1/2") Wheel Diameter: 2inch x 2inch / 50mm x 50mm ((D * T) Mounting Height: 2.4inch / 60mm Weight Capacity (Single): Max.30Kg / 66Lb Total Height (Including Stem Length): 85mm (3.35in) Weight: 810g Heavy Duty Ball Caster: Made of PP/Polyurethane and steel, very strong and durable swivel. 30kg (66lb) capacity