Spring Loaded Backdraft Damper 4"

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Neoprene damper seal minimizes leakage 20 gauge steel housing, aluminum spring loaded butterfly damper blades Gasket designed to withstand temperatures from -22 F to 180 F Requires from 0.04 to 0.08 in. wg pressure to open Simple installation in any position – entire assembly inserts into duct Exterior foam gasket assures a tight seal against duct Show more