10 In.dia Nrm Opn Rnd Stel Zone Cntrl Dampr, For Nominal Duct Diameter 10 in, Damper Application Motorized, Number of Panels Not Applicable, Overall Height 4 5/8 in, Overall Length 4 7/8 in, Rough Opening Shape Round, For Duct Shape Round, Overall Width 10 in, Frame Material Thickness Not Applicable, Blade Material Galvanized Steel, Maximum Air Pressure 1 in wc, Overall Diameter 10 in, Rough Opening Length 10 in, Rough Opening Width 10 in, Damper Type Dynamic, Maximum Air Velocity Not Applicable