Zone Control Damper For Nominal Duct Diameter 5 in Damper Application Motorized Number of Panels Not Applicable Overall Height 8 7/8 in Overall Length 8 3/4 in Rough Opening Shape Round For Duct Shape Round Overall Width 8 7/8 in Frame Material Thickness Not Applicable Blade Material Galvanized Steel Maximum Air Pressure 175 psi Overall Diameter 5 in Rough Opening Length 5 in Rough Opening Width 5 in Damper Type Dynamic Maximum Air Velocity 175 psi Nameplate Voltage 24V AC