With damper

Material
ASTM-A653 CS Type B Galvanized Steel, G-30 Coating LFQ Chemical Treatment *26GA G-90 Coating LFQ Chemical Treatment Available to meet SMACNA

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
Duro Dyne #7210 ESO38R-150 3/8″ standoff regulator 1 1/2″ wrap
Duro Dyne #7206 ESO14R-200 1/4″ standoff regulator 2″ wrap