Hyjoy 8"/200mm HVAC Duct Manual Backdraft Damper Steel Airflow Ducting Vent Damper Air Control, Adjustment Handle for HVAC Duct

Color: ; Material: Plastic; Outer Diameter of Top Interface: 285 mm / 11.22 inch; Outer Diameter of Bottom Interface: 298 mm / 11.73 inch; for Ducting Hose with Inner Diameter: 300mm / 12 Inch; Overall Dimensions: 330 330 80 mm / 12.99 12.99 3.15 inch (**); Diagonal Hole Distance: 354 mm / 13.94 inch; Adjacent Holes Distance: 250 mm / 9.84 inch; Packing List: 1 Duct Connector Flange Advantage: 1. The connector is constructed from plastic material, offering corrosion resistance and temperature tolerance, ensuring durability. 2. The connector base screw holes, enabling fixation with screws without additional , making installation straightforward. For ducted ventilation , install the duct connector and connect your exhaust hose to our duct connector. Usage: The duct connector flange is primarily designed to attach duct (not included) for airflow output via bolted connections. Commonly in HVAC , kitchens, restrooms, garages, and workplaces. Suitable for areas requiring ventilation . NOTE: verify the outer diameter of the connector before .