Plate Caster with Flat-Free Wheels Load Rating Range 300 to 999 lb Load Rating 300 lb Tread Sawtooth Wheel Dia 10 1/4 in Wheel Width 3 1/4 in Inside Bolt Hole Spacing 4 in x 4 in Outside Bolt Hole Spacing 4-7/16 in x 4-7/16 in Caster Brake Type No Brake Included Caster Product Group Swivel Caster Caster Sub-Type Swivel Operating Temperature Range -40 Degrees to 180 Degrees F Non-Marking Yes Wheel/Tread Material Polyurethane Tire Rim Dia 6 13/32 in Tire Thickness 3 in