Corrosion-Resistant Bolt-Hole Caster 1/2 in Bolt Hole Dia 1/2 in Mounting Bolt Dia Stainless Steel Caster Frame Material Stainless Steel Frame Finish 300 to 999 lb Load Rating Range 330 lb Load Rating 1 Number of Wheels Roller 5 7/8 in Mounting Height 4 7/8 in Wheel Dia 1 5/8 in Wheel Width Rubber Wheel/Tread Material 65 Shore A Wheel/Tread Hardness Soft Yes Non-Marking