This caster set is ideal for heavy-duty industrial applications. The pack includes four casters with a load capacity of 3200 pounds, and features two swivel with brakes and two rigid. They have a 6" wheel diameter, 2" wheel width, and a top plate size of 4"x4-1/2" with mounting over heights of 7-1/2". Made with durable materials, the roller bearings have a hardened raceway for extra strength and durability. They operate quietly, provide superior floor protection, and are easy to clean. Upgrade your equipment with this reliable caster set today.