"Double ball raceway swivel caster with 1/2in. diameter king pin. Zinc-plated, 12-gauge steel fork and top plate. Bolt Hole Spacing 3 7/16 x 2 3/8, Wheel Type Polyolefin, Bearing Type Plain, Overall Height in. 5, Caster Type Swivel, Finish Type Zinc plated, Mount Height in. 5, Wheel Width in. 1 3/16, Material Type Steel, Capacity lbs. 300, Top Plate Dimensions L x W in. 4 1/8 x 3 3/8, Wheel Diameter in. 4, Casters qty. 4, Foot Brake No. Durable 4in. polyolefin wheel Double ball raceway swivel caster 12 gauge steel fork and top plate, with durable zinc plating 300-lb. capacity per caster"
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