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