Listing is for a set of four (4) Service Caster Series #30 swivel casters with 5" diameter by 2" wide polyurethane on polyolefin wheels with top lock brakes capable of supporting a total weight of 3,000 lbs. (750 lbs. per caster). When searching for a reliable and durable solution to your caster needs, consider Service Caster Series 30 top plate polyolefin wheel casters. The Service Caster Series #30 features light weight polyolefin wheels that are resistant to shock, chemicals and abrasion, and finely crafted with a bright zinc plated finish and heat-treated ball bearing raceway. These versatile casters are ideal for a wide range of applications, such as dollies, platform trucks, warehouse carts and freight terminals. Or ensure a smooth and secure ride for food service carts, hotel housekeeping carts, and industrial and commercial equipment. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series 30, keeping you moving forward. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward.