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2 Pack 4 Inch Backdraft Damper One Way Airflow Duct Insert Backflow Preventer Draft Blocker For Dryer Range Hood

<ul><li>[Package Contents]: Generously includes two high-quality 4-inch backdraft damper ducts each precisely measuring 3.5 inches in height designed to flawlessly fit standard 4-inch HVAC duct openings.</li><li>[Durable Construction]: Features an exceptionally robust galvanized steel housing perfectly complemented by premium inner rubber gaskets that create a completely airtight seal and highly secure grip.</li><li>[Effortless Installation]: Ingeniously designed for incredibly simple push-in installation directly into ventilation pipes functioning perfectly in both horizontal and vertical household duct setups.</li><li>[Functional Design]: This highly advanced airflow regulating shutter opens absolutely only with outgoing air effectively and completely preventing freezing cold air or harsh wind from entering your home.</li><li>[Broad Application]: The ultimate professional draft blocker absolutely ideal for securely sealing dryer vents AC exhaust systems kitchen range hoods and diverse commercial heating applications.</li></ul>

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Prevent freezing cold drafts and outside wind from entering your home with this 2-pack of 4-inch backdraft dampers. Featuring a heavy-duty galvanized steel housing and airtight rubber gaskets, this one-way airflow insert is absolutely perfect for sealing dryer vents, bathroom fans, and kitchen range hoods.

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