"Cold-forged steel construction with steel ball bearings. 2 1/2in. x 3 3/4in. top blate with a bolt hole spacing of 1 3/4in. x 2 3/4in.. Capacity (lbs.): 255, Wheel Size (in.): 4, Bolt Hole Spacing: 1 3/4 x 2 3/4, Top Plate: 2 1/2 x 3 3/4, Wheel Type: Rigid, Material: Polyolefin, Includes (qty.): 1"
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