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![Photo 1 of [Upgraded] Hon&Guan 8 Inch Duct Backdraft Damper, Draft Blocker One-Way Airflow Ducting Backflow Preventer Duct Draft Blocker, HVAC Inline Fan](https://images-na.ssl-images-amazon.com/images/I/61hRmmQB+6L.jpg)
![Photo 2 of [Upgraded] Hon&Guan 8 Inch Duct Backdraft Damper, Draft Blocker One-Way Airflow Ducting Backflow Preventer Duct Draft Blocker, HVAC Inline Fan](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1044643377%2FfTJs-t0v5wTOts-b0-37H.jpeg?alt=media&token=5dd935b3-23af-4343-b433-7420d1554248)