Jack Post, 15-Gauge, Adjusts From 4' 5" To 7' 9" Brand_Sylvania the large-sized unit easily holds

the large-sized unit easily holds envelopes

Full Range Of All Major Tube Sizes

Made from polyester-reinforced EPDM rubber

bullseye zero

With Brass Pin

Jack Post, 15-Gauge, Adjusts From 4' 5" To 7' 9" Brand_Sylvania the large-sized unit easily holds4' 5" To 7' 9", 15 Gauge Adjustable Jack Post, Max Ext Load 11,350 LBS, 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 45 1 2", Screw Size 1" x 7", 5 Thread Support, Collar Size 2 1 4" x 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