General Purpose 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 770 lb Load Rating 1 Number of Wheels Precision Ball 11 9/16 in Mounting Height 4 7/8 in Wheel Dia 1 5/8 in Wheel Width Polyurethane Wheel/Tread Material 94 Shore A Wheel/Tread Hardness Hard Yes Non-Marking