Swivel, Corrosion- Standard Plate Caster, Load Rating 600 lb, Swivel Lock Type Total Lock, Wheel Dia. 4 in, Wheel Width 2 in, Wheel/Tread Material Polyurethane, Wheel Core Material Polyurethane, Non-Marking Yes, Number of Wheels 1, Caster Brake Type Total Lock Brake, Tread Shape Standard