These heavy-duty Plate Casters come in a pack of four and have a total load capacity of 4000 pounds. Made with a steel frame and phenolic wheels, they provide superior floor protection and quiet operation. The 6-inch diameter wheels have a 2-inch width and the top plate measures 4"x4-1/2", with mounting over heights of 7-1/2". The casters swivel 360 degrees and have a brake feature to lock them in place for added stability. Upgrade your equipment with these reliable and efficient Plate Casters.