6" HVAC Duct Damper, Manual Volume Backdraft Damper Airflow Control Valve

Senco CA0126 Trigger Valve Assembly Power Tool Airflow Control

RK 5-Inch Backdraft Damper Connector for Metal Ducts – Reliable Airflow Control

Senco BC0900 Valve Stop Power Tool Air Control Durable Construction

Milwaukee 31-15-0276 Dust Chute Exhaust 6"x5"x2" Durable Airflow Connection

4" HVAC Duct Damper, Manual Volume Backdraft Damper Airflow Control Valve

8 In x 4 In R6 Insulated Duct Board Register Box for HVAC Airflow Control

5" Motorized Volume Control Damper (HVAC Airflow), Stainless Steel, Free Shipp