SS Motrzd Vent Dampr 7.1 In.L 11.9 In.H 7.1 In.W For Nominal Duct Diameter 7 in Damper Application Vent Number of Panels Not Applicable Overall Height 11 7/8 in Overall Length 7 1/8 in Rough Opening Shape Not Applicable For Duct Shape Not Applicable Overall Width 7 1/8 in Frame Material Thickness 0.024 in Blade Material Stainless Steel Maximum Air Pressure Not Applicable Overall Diameter 7 in Rough Opening Length Not Applicable Rough Opening Width Not Applicable