2'9 To 4'7 15Ga Adjust Jack Post

2' 10" To 4' 7", 15 Gauge, Adjustable Jack Post, Max Ext Load 14,000 LB, Min Ext Load 18,000 LBS, Additional Support For Crawl Spaces, Attic, Staircase Or Decks, Adjusts With 3/4" Wrench, O.D. Gauge & Tube Dim 2-1/4" x 15 Gauge x 27", Screw Size 1" x 7", -5 Thread Support, Collar Size 2-1/2", Support Pins 1/2" x 3", 13 Gauge Plate Size 4" x 5", Corrosion Resistant Inside & Out, Double Carriage Bolt & Nut, Zinc Coated, For Added Safety, Heavy Plates Suited For Wood & Steel, Deep Dish Self-Centering Plates.