Stem Caster, Swivel Caster, 220 lb Load Rating, 0 to 299 lb, 5 in Wheel Dia., 1 1/4 in Wheel Width, Rubber Wheel/Tread Material, 6 7/16 in Mounting Height, Ball, 1/2 In.-13 x 2-1/4 in Caster Stem Size, Expanding Adapter, Steel Caster Frame Material, Zinc Plated Frame Finish, Yes Non-Marking, 1 Number of Wheels