Listing is for one (1) Service Caster Series #20 stainless steel swivel caster with a 3-1/2" diameter by 1-1/4" wide solid polyurethane wheel and a 3/8" threaded stem with total lock brake capable of supporting 300 lbs./caster.The Service Caster Series #20 is ideal for light and medium duty material handling, carts, equipment, and shop projects. The zinc plated finish provides durability under any condition. And the non-marking, non-marring polyurethane wheel is molded as one solid piece, making it free from debonding. This ensures the wheel will not flat spot, as can occur with comparable polyurethane wheels, resulting in a smooth and solid roll over long periods of time. Mounting options include top plate, bolt hole and standard and metric threaded stem sizes. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.