Dayton Backdraft Damper: 9-1/2 x 9-1/2 Damper Size (In.), 11-1/2 x 11-1/2 Overall Size (In.) 3TZ50 - 1 Each
$52.22
Backdraft Damper, Roof Mount, Exhaust, Damper Size (In.) 9-1/2 x 9-1/2, Overall Size (In.) 11-1/2 x 11-1/2, Flange Width (In.) 1 in, Max.