Stem Caster, Swivel Caster, 250 lb Load Rating, 0 to 299 lb, 4 in Wheel Dia., 1 1/4 in Wheel Width, Rubber Wheel/Tread Material, 5 1/8 in Mounting Height, Ball, 7/16 in x 1-3/8 in Caster Stem Size, Friction Ring, Steel Caster Frame Material, Zinc Plated Frame Finish, Yes Non-Marking, 1 Number of Wheels