Zone Control Damper For Nominal Duct Diameter 6 in Damper Application Motorized Number of Panels Not Applicable Rough Opening Shape Round For Duct Shape Round Overall Width Not Applicable Frame Material Thickness Not Applicable Blade Material Galvanized Steel Maximum Air Pressure Not Applicable Overall Diameter 6 in Rough Opening Length 6 in Rough Opening Width 6 in Damper Type Dynamic Maximum Air Velocity Not Applicable Nameplate Voltage 24V DC Rough Opening Diameter 6 in