Rigid, Swivel, Standard Plate Caster Kit, Load Rating 4800 lb, Swivel Lock Type No Lock Included, Wheel Dia. 6 in, Wheel Width 2 in, Wheel/Tread Material Cast Iron, Wheel Core Material Cast Iron, Non-Marking Yes, Number of Wheels 1, Caster Brake Type No Brake Included, Tread Shape Standard, Package Quantity 4