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The Lambro Industries 143BL 4 Inch Exhaust Soffit Dryer Vent Damper is designed for new or replacement vent installations, effectively preventing outside elements and air from entering when not in use. This soffit cap features a gravity damper that opens to allow exhaust air to exit through an 11 square inch net free area. Constructed from polymer resin with a UV additive, it resists fading and is suitable for clothes dryer and bath fan exhaust applications.
Soffit vent with gravity damper for 4-inch openings, made of UV-resistant polymer resin.
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