Best Seller | DAYTON 3HGN7 Volume Control Damper,8-1/4"D,6"Duct Dia 6 In.dia GSteel Manual Control Dampr, Damper Application Control, For Nominal Duct Diameter 6 in, Frame Material Steel, Number of Panels 1, Maximum Air Velocity 3000 fpm, Overall Height Not Applicable, Rough Opening Diameter 6 in, Rough Opening Shape... ... more DAYTON 3HGN7 Volume Control Damper,8-1/4"D,6"Duct Dia 6 In.dia GSteel Manual Control Dampr, Damper Application Control, For Nominal Duct Diameter 6 in, Frame Material Steel, Number of Panels 1, Maximum Air Velocity 3000 fpm, Overall Height Not Applicable, Rough Opening Diameter 6 in, Rough Opening Shape... | | $234.99 go to store |