Lambro 3440 4-In. Aluminum Wall Exhaust Hood Vent With Damper And 11-In. Pipe, N

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Recommended for clothes dryer or bath fan exhaust installations;
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For new or replacement vent installations;
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Mounts over existing 4-in. openings;
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11-in. pipe for through-the-wall installation;
does not include interior trim plate;
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Designed for maximum airflow;
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Features an opening with a net-free area of 20.5 sq. in.;
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Opening and closing damper stays closed when not in use;
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Made of 26-gauge aluminum hood for durability and will not rust to maintain longevity;
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Installation screws not included;