12 In.dia Nrm Opn Rnd Stel Zone Cntrl Dampr, For Nominal Duct Diameter 12 in, Damper Application Motorized, Number of Panels Not Applicable, Overall Height 14 1/8 in, Overall Length 12 1/2 in, Rough Opening Shape Round, For Duct Shape Round, Overall Width 12 in, Frame Material Thickness Not Applicable, Blade Material Galvanized Steel, Maximum Air Pressure Not Applicable, Overall Diameter 12 in, Rough Opening Length 12 in, Rough Opening Width 12 in, Damper Type Dynamic
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