Bolt-Hole Caster, 1/2 in Bolt Hole Dia., 1/2 in Mounting Bolt Dia., Steel Caster Frame Material, Zinc Plated Frame Finish, 300 to 999 lb Load Rating Range, 495 lb Load Rating, 1 Number of Wheels, Roller, 5 1/2 in Mounting Height, 4 in Wheel Dia., 1 3/8 in Wheel Width, Nylon Wheel/Tread Material, 80-85 Shore D Wheel/Tread Hardness, Hard, Yes Non-Marking. This item has been restricted from sale in the following state (s): []