![Atmosphere Backdraft Damper, 12](http://goodgrow.com/cdn/shop/products/VTBDD12_1_{width}x.jpg?v=1632662883)
Atmosphere all new galvanized steel backdraft dampers fit directly into the duct, simplifying installation. They feature a shaft for each of the two flaps, which prevents jamming. Also, the flaps close onto a perimeter gasket, ensuring the best air seal and quiet operation.