Rigid, V-Groove Track-Wheel Plate Caster, Load Rating 4500 lb, Swivel Lock Type No Lock Included, Wheel Dia. 6 in, Wheel Width 3 in, Wheel/Tread Material Steel, Wheel Core Material Forged Steel, Non-Marking Yes, Number of Wheels 1, Caster Brake Type No Brake Included, Tread Shape V-Groove