Listing is for one (1) Service Caster Series #20 stainless steel swivel caster with a 4" diameter by 1-1/4" wide red polyurethane wheel and a 1/2"-13 X 1-1/2" threaded stem with brake capable of supporting 300 lbs./caster.When searching for a reliable and durable solution to your caster needs, consider Service Caster?s Series 20 stainless steel threaded stem polyurethane casters. The Service Caster Series #20 is ideal for light and medium duty material handling, carts, equipment, and shop projects. The threaded stem is available in standard or metric sizes and ensures a solid and secure attachment. The polished stainless steel finish provides durability under any condition, while the non-marking, non-marring polyurethane wheels perform especially well on hard surfaces such as concrete, tile, and wood. All rolling via a finely crafted ball bearing design that will keep you moving forward. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.