Listing is for a set of four (4) Service Caster Series #20 casters, four (4) swivel bolt hole casters with total lock brakes, 3” diameter by 1-1/4” wide thermoplastic rubber wheels. Supports a total weight of 8400lbs (210lbs/per caster). When searching for a reliable and durable solution to your caster needs, consider Service Caster’s Series 20 thermoplastic rubber casters. 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 soft, quiet and non-marking thermoplastic rubber wheels perform especially well on hard surfaces such as concrete, tile, and wood. They are resistant to water, oil, and grease and will keep you safely moving forward. 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.