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An anti-pull channel insert designed for use with various hoods, bathroom fans and other HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and canals. Mounted horizontally or vertically to prevent backflow and debris from entering channels. Galvanized steel body with spring-loaded aluminum damper blade that opens with minimal airflow. Fit For 6 Inch. Channel Openings | Item Length: 5 in | Finish: Powder Coat