Photo 1 of PATIKIL 3" Duct Damper, Stainless Steel Motorized Adjustable HVAC Volume Dampers Airflow Backdraft Damper Control for HVAC Air Balancing System, AC 24V

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Photo 1 of PATIKIL 3" Duct Damper, Stainless Steel Motorized Adjustable HVAC Volume Dampers Airflow Backdraft Damper Control for HVAC Air Balancing System, AC 24VPhoto 2 of PATIKIL 3" Duct Damper, Stainless Steel Motorized Adjustable HVAC Volume Dampers Airflow Backdraft Damper Control for HVAC Air Balancing System, AC 24V