ManualDesigned to regulate airflow, but not intended for use where positive shut-off or automatic control is needed. Features manual hand quadrant that can be locked in place.Balancing Dampers â?¢ Galvanized Steel Velocity rating: 2000 fpm Pressure rating: 1.0" wg Max. temp.: 180 Degrees F

6 In.dia GSteel Manual Balancing Dampr, Damper Application Balancing, For Nominal Duct Diameter 6 in, Frame Material Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height Not Applicable, Rough Opening Diameter 6 in, Rough Opening Shape Round, Fits Fan Diameter Not Applicable, For Duct Shape Round, Overall Width Not Applicable, Frame Material Thickness 16 ga, Overall Length 6 3/8 in, Connection Type Not Applicable, Frame Depth 6 3/8 in, Rough Opening Length Not Applicable