Plate Caster with Pneumatic Wheels Load Rating Range 300 to 999 lb Load Rating 625 lb Tread Sawtooth Wheel Dia 12 in Wheel Width 4 1/8 in Inside Bolt Hole Spacing 4-1/8 in x 6-1/8 in Outside Bolt Hole Spacing 4-1/8 in x 6-1/8 in Caster Brake Type Swivel Lock with Side Pedal Brake Caster Product Group Swivel Caster with Four Position Swivel Lock Caster Sub-Type Swivel Operating Temperature Range -30 Degrees to 120 Degrees F Non-Marking No Wheel/Tread Material Rubber