Stem Caster, Swivel Caster, 230 lb Load Rating, 0 to 299 lb, 3 1/2 in Wheel Dia., 1 1/4 in Wheel Width, Polyolefin Wheel/Tread Material, 4 1/2 in Mounting Height, Delrin, 7/16 in x 1-7/16 in Caster Stem Size, Friction Ring, Steel Caster Frame Material, Zinc Plated Frame Finish, Yes Non-Marking, 1 Number of Wheels