These heavy-duty plate casters feature an 8" wheel diameter and 2" wheel width, with a total load capacity of 6000 pounds per pack of 4. The phenolic material ensures superior floor protection and easy cleaning, while the swivel casters can rotate a full 360 degrees. Roller bearings with hardened raceways provide added strength and quieter operation. The top plate measures 4"x4-1/2" with mounting over heights of 9-1/2". This product includes 2 swivel and 2 rigid casters for maximum versatility.