Listing is for a set of four (4) Service Caster Series #20 stainless steel casters, two (2) swivel 3/8"-16 X 1-1/2" threaded stem with total lock brake casters and two (2) swivel casters, with 5” diameter by 1-1/4” wide yellow polyurethane wheels. Supports a total weight of 1,400lbs (350lbs/per 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.