16 In.dia SS Barometric Draft Control, Damper Application Barometric Draft Control, For Nominal Duct Diameter 15 in; 16 in, Frame Material Steel, Number of Panels Not Applicable, Maximum Air Velocity Not Applicable, Overall Height 17 1/2 in, Rough Opening Diameter 16 in, Rough Opening Shape Round, Fits Fan Diameter Not Applicable, For Duct Shape Round, Free Area Not Applicable, Overall Width 17 1/2 in, Frame Material Thickness 18 ga, Overall Length 22 in, Connection Type Press Fit
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