Hyjoy 2 Pcs 6" HVAC Duct Manual Volume Backdraft Damper Metal Adjustment Airflow Ducting Damper Steel with Adjustment Handle for Air Ventilation Hoods

Convenient Pack: the set contains 2 pieces of 6 inch backdraft damper, ample quantity to meet your needs when it comes to proper ventilation, you can balance the airflow in multiple locations, enhancing the overall Size: outer diameter approximately 6 inches / 150 mm, length around 8 inches / 200 mm, the HVAC duct manual volume damper fits seamlessly into your ventilation pipe, enabling control for your air conditioning and ventilation and Reliable: The 6-inch damper for air ducts is made from 201 steel, offering corrosion and rust resistance, capable of enduring various environmental conditions, ensuring efficient airflow while providing reliability : 90-degree rotating rubber sleeve handle, the airflow ducting vent damper provides and in use, to install, slide it straight into your ventilation pipe, then and hide the seam Multifunctional Use: Designed to regulate the air volume in the pipe, it also adjusts and fresh air and return air. The HVAC damper can be for residential HVAC , air conditioning, ventilation, and more