Butterfly Backdraft Damper (3 Inch) (BD 3)
Brand: HVAC Express

Backdraft damper with lightweight blades and foam closure to eliminate noise and increase efficiency. Proven design to protect against backdraft in your appliance venting Easy to install, heavy duty 26 gauge galvanized metal Foamed shutter system for quiet closure Vertical or horizontal mounting, with one end crimped Dampers are available in sizes 3" up to 24" ducting. Specifications Sheet - Butterfly Backdraft Damper

Backdraft damper with lightweight blades and foam closure shutter for quiet closure
Proven design to protect against backdraft in your appliance venting
Vertical or horizontal mounting, with one end crimped
Heavy-duty 26 gauge galvanized metal
Made in the USA