Adjustable Steel Building Column 4" OD, 11 Gauge, 4" Adjustment Range Allowable Load Capacity* 26,800 lbs. 4" Adjustment Range Fully assembled, self-contained unit, constructed of high carbon, heavy duty steel Finished with corrosion-resistant powder (exceeds ASTM-B117-85) 4.0" OD 11 Gauge (Swivel Plate on Screw End / Rectangular Plate on Tube End)