Replacement Caster for Wire Shelving, Swivel Caster, 300 lb Load Rating, 300 to 999 lb, 5 in Wheel Dia., 1 1/4 in Wheel Width, Polyurethane Wheel/Tread Material, 6 3/8 in Mounting Height, Delrin, 27/32 in x 2-3/16 in Caster Stem Size, Friction Ring,...