5.8 In.H 9.8 In.W 2 In.L GStl Manual Balnc 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 Rectangular Fits Fan Diameter Not Applicable For Duct Shape Rectangular Overall Width 5 3/4 in Frame Material Thickness 22 ga Overall Length 1 7/8 in Connection Type Not Applicable Frame Depth 1 7/8 in Rough Opening Length Not Applicable