Plate Caster with Flat-Free Wheels, Load Rating Range 0 to 299 lb, Load Rating 275 lb, Tread Sawtooth, Wheel Dia. 8 in, Wheel Width 3 in, Inside Bolt Hole Spacing 3 in x 3 in, Outside Bolt Hole Spacing 2-3/4 in x 3-5/8 in, Caster Brake Type No Brake Included, Caster Product Group Rigid Caster, Caster Sub-Type Rigid, Operating Temperature Range 0 Degrees to 100 Degrees F, Non-Marking Yes, Wheel/Tread Material Polyurethane, Tire Rim Dia. 4 39/64 in, Tire Thickness 2 1/16 in