RWM Casters S65 Series Plate Caster, Rigid, Kingpinless, Urethane on Polypropylene Wheel, Stainless Steel Plate, Ball Bearing, 750 lbs Capacity, 5" Wheel Dia, 2" Wheel Width, 6-1/2" Mount Height, 4-1/2" Plate Length, 4" Plate Width