Plate Caster with Flat-Free Wheels Load Rating Range 300 to 999 lb Load Rating 440 lb Tread Smooth Wheel Dia 10 1/4 in Wheel Width 3 3/8 in Inside Bolt Hole Spacing 5-1/2 in x 5-1/2 in Outside Bolt Hole Spacing 5-1/2 in x 5-1/2 in Caster Brake Type Total Lock Brake Caster Product Group Swivel Caster with Total Lock Caster Sub-Type Swivel Non-Marking No Wheel/Tread Material Rubber Frame Finish Zinc Plated Swivel Raceway Type Double Ball Mounting Bolt Dia 9/16 in