Photo 1 of PATIKIL 7 Inch Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector for Kitchen Bathroom Exhaust Fan HVAC, Red

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Photo 1 of PATIKIL 7 Inch Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector for Kitchen Bathroom Exhaust Fan HVAC, Red