AC Infinity 4 Backdraft Damper OneWay Airflow Ducting Insert with SpringLoaded Folding Blades for 4 Ducting in Range Hoods and Bathrooms Fans

An antidraft duct insert designed for use with range hoods bathroom fans and other home HVAC applications Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts Mounts horizontally or vertically to prevent backflow and debris from entering ducting Galvanized steel body with springloaded aluminum damper blades that open with minimal airflow Fit for 4 in Duct Openings Product Length 503 inches Finish Powder Coat.