Description:1. Material: The ball caster is made of PP material, thick and elastic, bass sliding, not easily corrode aging.2. Design: Swivel furniture caster with a mounting rod socket structure, easy to install. 360-degree swivel for easy maneuverability, allowing you to move furniture effortlessly.3. Advantage: Ball bearing, small friction resistance, can withstand high temperature, high speed, low noise, not easy to wear. Thickened rivets are used to reinforce the shaft, high speed, not easy to wear, not easy to loosen screws.4. Application: The caster wheel fits most furniture, including chairs, sofas, desks, cabinets, bookcases, dressers and more.Specification:Material: PP, MetalWheel Diameter: 50mm / 2"Installation Height: 64mm /2.52"Rod Size: 11 x 22mm / 0.43" x 0.87"(D*L)Package Content: 4pcs x Ball Caster Wheels