Photo 1 of Draft Blocker 4'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap

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Photo 1 of Draft Blocker 4'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct Connector with Backdraught Flap