Stem Caster, Swivel Caster, 250 lb Load Rating, 0 to 299 lb, 3 in Wheel Dia., 1 1/4 in Wheel Width, Polypropylene Wheel/Tread Material, 4 1/8 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, 1 Number of Wheels