BQLZR 1.5" Durable Polyurethane Rubber Swivel Wheels Home Office Furniture Chair Caster With Wire Teeth And Brake Replacement Pack of 4 Rubber Swivel Wheels Swivel and roll freely and more quietly in every direction with no need for maintenance. This set of 4 hard floor casters wheel will fit most office chairs. Each caster is designed to glide smoothly across any hard floor surface including wood and wood laminate. Casters are composed of a rubber and polyurethane material and feature a hooded design with a 1.5" diameter .