Stem Caster, Swivel Caster, 150 lb Load Rating, 0 to 299 lb, 4 in Wheel Dia., 1 in Wheel Width, Polyolefin Wheel/Tread Material, 4 13/16 in Mounting Height, Plain, 7/16 in x 1-29/32 in Caster Stem Size, Friction Ring, Steel Caster Frame Material, Zinc Plated Frame Finish, Yes Non-Marking, 1 Number of Wheels