Plate Caster with Pneumatic Wheels, Load Rating Range 300 to 999 lb, Load Rating 330 lb, Tread Sawtooth, Wheel Dia. 8 in, Wheel Width 3 in, Inside Bolt Hole Spacing 2-7/16 in x 4-15/16 in, Outside Bolt Hole Spacing 3-3/8 in x 5-1/4 in, Caster Brake Type No Brake Included, Caster Product Group Swivel Caster, Caster Sub-Type Swivel, Operating Temperature Range -30 Degrees to 120 Degrees F, Non-Marking No, Wheel/Tread Material Rubber, Tire Rim Dia. 4 in, Frame Finish Enamel, Tread Color Black