The Shepherd 3 in. Polypropylene Wheel Swivel Plate Caster gives mobility to heavy loads on smooth, hard surfaces. It features a 210 lb. load rating and a 360-degree swivel design. Its wheel is lightweight, chemical resistant and waterproof, and the caster attaches with a 3-1/8 in. x 4-1/8 in. plate and 4 screws. Color: black.