"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, Bolt Hole Spacing 3-3 5/8 x 2 5/8-3, Overall Height in. 9 1/2, Foot Brake No, Wheel Width in. 2, Capacity lbs. 1,200, Wheel Diameter in. 8, Top Plate Dimensions L x W in. 4 1/2 x 4, Bearing Type Roller, Wheel Type Phenolic canvas, Casters qty. 1, Material Type Steel, Caster Type Swivel, Finish Type Gray. 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"