With damper

Material
ASTM-A653 CS Type B Galvanized Steel, G-30 Coating LFQ Chemical Treatment

Gasket
Fire Retardant Polyethylene Foam with Double Stick 3M Tape UL94 HF-1

Assembly
Air Tites are assembled with 1/8″ x 1/8″ Zinc Coated Steel Rivets.

Options
Available in 26GA and 24GA upon request Aluminum: 4-14″-Fabricated from 3003-H14 in 26GA

Raised Quadrants
A Duro Dyne #7210 ESO38R-150 3/8″ Standoff Regulator for 1 1/2″ wrap Duro Dyne #7206 ESO14R-200 1/4″ Standoff Regulator for 2″ wrap.