Stem Caster, Swivel Caster with Brake, 225 lb Load Rating, 0 to 299 lb, 2 in Wheel Dia., 13/16 in Wheel Width, Polypropylene Wheel/Tread Material, 2 3/4 in Mounting Height, Plain, 1/2 In. -13 x 1 1/2 in Caster Stem Size, Threaded, Steel Caster Frame Material, Zinc Plated Frame Finish, Yes Non-Marking, 2 Number of Wheels