Plate Caster with Semipneumatic Wheels Load Rating Range 300 to 999 lb Load Rating 350 lb Tread Ribbed Wheel Dia 8 in Wheel Width 2 1/2 in Inside Bolt Hole Spacing 4-1/8 in x 4-1/2 in Outside Bolt Hole Spacing 4-1/8 in x 4-1/2 in Caster Brake Type No Brake Included Caster Product Group Swivel Caster Caster Sub-Type Swivel Non-Marking No Wheel/Tread Material Rubber Tire Rim Dia 4 in Tire Thickness 2 in Frame Finish Zinc Plated Tread Color Black Swivel Raceway Type Double Ball