• Use for supporting sagging floors, weak beams and warping stairways • 2-1/4 x 15 gauge prime steel inner tubing • 2-1/2 x 15 gauge prime steel outer tubing • 2-1/4 steel collar • 1 x 6 steel screw • Two 4 x 4 x 10 gauge steel plates • 7 turning handle.Grooved pin and plain pin • Flow coated with red corrosion-resistant paint • Packed with instructions • UPC symbol on carton • Maximum load capacity obtained at lowest extension • Grooved pin and plain pin • Flow coated with red corrosion-resistant paint • Packed with instructions • UPC symbol on carton • Maximum load capacity obtained at lowest extension. • Adjust In=12 to 16 • Cap Lbs=18