"Fairbanks Polyolefin Rigid Caster is constructed of cold-forged steel with steel ball bearings. Overall Height in. 4 3/16, Bolt Hole Spacing 2 7/8 x 1 3/4, Mount Height in. 4 3/16, Material Type Steel, Capacity lbs. 150, Caster Type Rigid, Wheel Type Polyolefin, Wheel Width in. 1 1/4, Bearing Type Plain, Foot Brake No, Casters qty. 1, Wheel Diameter in. 3, Finish Type Zinc plated. Zinc electrogalvanized finish for bright look and rust prevention Rugged polyolefin wheel Riveted king pin 150 lb. capacity"