RWM Casters 75 Series Plate Caster, Swivel, Kingpinless, Cast Iron Wheel, Roller Bearing, 4000 lbs Capacity, 10" Wheel Dia, 3" Wheel Width, 11-1/2" Mount Height, 6-1/2" Plate Length, 4-1/2" Plate Width Extra Heavy Duty Kingpinless 10” x 3” Semi Steel Cast