Southwark ATTRP9 - 9" Air-Tite Round Pipe TakeoffModel ATTRP: Air-Tite Round Pipe Takeoff Material: Hot Dipped Galvanized Steel per ASTM A653 CS Type B 26 gauge 1/2" overlap with 1/8" rivets RL-2 rivet seam (+/- 4" w.g.) 1 1/4" crimp length 5 3/4" to 14 3/4" tube length Gasket 1 1/2" wide and 1/8" thick; made with high tack adhesive-coated neoprene foam Four 1/8" holes in gasket for sheet metal screw attachment