"Double ball raceway swivel caster with 1/2in. diameter king pin. Zinc-plated, 12-gauge steel fork and top plate. 3in. polyolefin wheel, 1 1/4in. tread width. 3 3/4in. overall height. 3 3/16in. x 4 1/8in. top plate. Slotted hole pattern 1 11/16in.-2 3/8in.W x 2 7/8in.-3 7/16in.L. 250-lb. load capacity per caster. Capacity lbs. 250, Caster Type Swivel, Foot Brake No, Wheel Width in. 1 1/4, Material Type Steel, Mount Height in. 3 3/4, Wheel Type Polyolefin, Finish Type Zinc plated, Bearing Type Plain, Top Plate Dimensions L x W in. 4 1/8 x 3 3/16, Wheel Diameter in. 3, Bolt Hole Spacing 2 7/8 to 3 7/16 x 1 11/16 to 2 3/8, Casters qty. 4, Overall Height in. 3 3/4. Durable 3in. polyolefin wheel Mirror-smooth, high density primary and secondary raceways Large secondary raceway for greater swivel efficiency and better shock absorption 250-lb. capacity per caster"
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