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Tools & Home Improvement > Building Supplies > Heating & Cooling > Ducting |
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Product Description Spring loaded for positive closure. Fits 8" Round Duct 20 gauge galvanized steel housing Aluminum spring loaded butterfly damper blades Damper seals against EDPM rubber gasket in closed position for minimal leakage Gasket designed for use in temperatures from - 22F to 180F Require from 0.Backdraft damper with galvanized steel collar and lightweight aluminum damper blades. Aldes 8" Backdraft Damper - BDD8 - Amazon.com Shipping Weight: 8 pounds | ||||||||
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