These plate casters have a load capacity of 3600 pounds and include a pack of 4 with 2 swivel casters with brakes and 2 without. The 4-inch phenolic wheels have a width of 2 inches and a top plate size of 4"x4-1/2". The swivel casters can rotate 360 degrees and the roller bearings have a hardened raceway for extra strength and quieter operation. These casters provide superior floor protection and are easy to clean, making them suitable for a range of industries.