Photo 1 of EATAKWARD 6 Inch Backdraft Damper HVAC Duct Manual Volume Damper Adjustment Airflow Ducting Branch HVAC Air Balancing for Air Ventilation System 2 Pcs

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Photo 1 of EATAKWARD 6 Inch Backdraft Damper HVAC Duct Manual Volume Damper Adjustment Airflow Ducting Branch HVAC Air Balancing for Air Ventilation System 2 PcsPhoto 2 of EATAKWARD 6 Inch Backdraft Damper HVAC Duct Manual Volume Damper Adjustment Airflow Ducting Branch HVAC Air Balancing for Air Ventilation System 2 Pcs