Listing is for a set of four ( 4) Service Caster Series No.30 316 stainless steel swivel casters with 6" diameter by 2" wide polyolefin wheel and roller wheel bearings with bolt on swivel locks capable of supporting a total weight of 2800 lbs. ( 700 lbs. per caster). When searching for a reliable and durable solution to your caster needs, consider Service Caster Series 30 316 stainless steel polyolefin wheel casters. The Service Caster Series No.30 features light weight polyolefin wheels that are resistant to shock, chemicals and abrasion, and finely crafted with a 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. In contrast to the zinc plated caster, the luxuriously polished stainless steel finish resists rust and corrosion in indoor or outdoor applications where moisture is a factor. Features 316 Stainless Steel Heavy Duty Swivel Caster with 6 in. Polyolefin Wheels. Set of 4. Includes 4 Swivel with Bolt on Swivel Locks. Specifications Caster Type: Swivel. Material: 316 Stainless Steel. Wheel Size: 6". Capacity: 2800 lbs. Dimension: 7.5" H x 12" W x 12" L. Weight: 21.6 lbs.