"The Fairbanks Swivel Zinc-Plated Caster features all-steel exclusive Lockweld construction. Zinc galvanized finish. Swivel casters are single ball race. Semi-Steel Wheels. U.S.A. Finish Type Zinc plated, Bolt Hole Spacing 3 x 1 3/4, Capacity lbs. 200, Wheel Type Semi-steel, Casters qty. 1, Material Type Steel, Wheel Width in. 1, Bearing Type Plain, Wheel Diameter in. 2 1/2, Foot Brake No, Overall Height in. 3 1/4, Mount Height in. 3 1/4, Caster Type Swivel, Top Plate Dimensions L x W in. 3 3/4 x 2 5/8. Cold-formed for added strength and durability Zinc electro-galvanized finish assures a bright look and prevents rust Unique construction replaces king pin with a strong welded structure Rugged semi-steel wheels 200-lb. capacity"