9.75 In.H-W 2 In.L Squ Manual Balancing Dampr, Damper Application Balancing, Frame Material Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 9 3/4 in, Rough Opening Diameter Not Applicable, Rough Opening Shape Square, Fits Fan...
9.75 In.H-W 2 In.L Squ Manual Balancing Dampr, Damper Application Balancing, Frame Material Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 9 3/4 in, Rough Opening Diameter Not Applicable, Rough Opening Shape Square, Fits Fan...