"The Fairbanks Swivel Weldless Caster features one-piece construction to eliminate stress buildup. Double ball raceways and seal ring keep lubrication in and dirt out. U.S.A. Mount Height in. 9 1/2, Overall Height in. 9 1/2, Wheel Type Phenolic canvas, Casters qty. 1, Wheel Width in. 2, Bolt Hole Spacing 3-3 5/8 x 2 5/8-3, Top Plate Dimensions L x W in. 4 1/2 x 4, Bearing Type Roller, Foot Brake No, Wheel Diameter in. 8, Capacity lbs. 1,200, Finish Type Gray, Material Type Steel, Caster Type Swivel. One piece fork assures less failure and longer life 3/4in. king pin is orbital cold forged for superior strength and stability Nylon grease seal keeps dirt and debris out of the upper ball raceway Gray powder-coat finish prevents corrosion Rugged phenolic/canvas wheel 1200 lbs. capacity"