16 in Backdraft Damper / Wall Shutter, Front Flange, DAYTON, Mfr# 3HHN6

19 In.H-W 5 1/4 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 1, Maximum Air Velocity 2500 fpm, Overall Height 19 in, Rough Opening Diameter 16 1/2 in, Rough Opening Shape Square, Fits Fan Diameter 16 in, For Duct Shape Not Applicable, Free Area 1.4 sq ft, Overall Width 19 in, Frame Material Thickness 0.8 in, Overall Length 5 1/4 in, Connection Type Not Applicable, Frame Depth 3 in