PATIKIL 4 Inch Backdraft Damper Control Valve, Duct Manual Volume Adjustment Airflow Ducting For Fan Airflow, Dryer Vent, Range Hood, White

Durable Material:The body is made from stainless steel material and the flap blade is made from aluminum, durable material for long-lasting performance. Constructed with sturdy components to ensure reliability. Size: Port Outer Diameter: 100mm / 4 inch; Length:160mm / 6.3 inchManual Airflow Adjustment: Enjoy a comfortable environment with our damper sleeve, designed to use the manual handle on the valve to adjust the air volume from multiple angles. Also, this innovative design ensures smooth and silent operation when the flap board opens or closes. Save time and effort with our design that allows for quick and straightforward installation. Applications:The manual volume damper is used for air volume regulation in an air ventilation system, and it is widely used in the HVAC industry. Durable Material: The body is made from stainless steel material and the flap blade is made from aluminum, durable material for long-lasting performance. (Size: Port Outer Diameter: 100mm / 4 inch; Length:160mm / 6.3 inch) Manual Airflow Adjustment: Enjoy a comfortable environment with our damper sleeve, designed to use the manual handle on the valve to adjust the air volume from multiple angles. Applications: The manual volume damper is used for air volume regulation in an air ventilation system, and it is widely used in the HVAC industry.