Rigid, Corrosion-Resistant Long-Swivel-Life Standard Plate Caster, Load Rating 400 lb, Swivel Lock Type No Lock Included, Wheel Dia. 4 in, Wheel Width 2 in, Wheel/Tread Material Rubber, Wheel Core Material Nylon, Non-Marking Yes, Number of Wheels 1, Caster Brake Type No Brake Included, Tread Shape Standard