Motorized Damper, For Nominal Duct Diameter 9 in, Damper Application Intake or Exhaust, Number of Panels 1, Overall Height 13 7/8 in, Overall Length 9 1/8 in, Rough Opening Shape Not Applicable, For Duct Shape Round, Overall Width 13 7/8 in, Blade Material Stainless Steel, Maximum Air Pressure 1 in wc, Overall Diameter 9 in, Rough Opening Length Not Applicable, Rough Opening Width Not Applicable, Damper Type Dynamic, Maximum Air Velocity 1,000 fpm, Nameplate Voltage 24V AC