These heavy-duty plate casters have a 6-inch phenolic wheel with a 2-inch width and a weight capacity of 4000 pounds. The pack of four includes 2 swivel casters with brakes and 2 rigid casters, providing maximum maneuverability and stability. Roller bearings with a hardened raceway offer extra strength, quieter operation, superior floor protection, and easy cleaning. The top plate measures 4"x4-1/2" with a mounting over height of 7-1/2". Ideal for industrial applications, these plate casters are designed to exceed your expectations.