12" Adjustable Damper Kit with Hardware.
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12" ADJUSTABLE DAMPER: Adjustable Dampers are used to control airflow through a duct run. The disk is sheet metal and is attached internally to a T-Wyes, Elbows, or start collars. A hole is drilled for attaching the damper handle and screw assembly for adjusting the airflow opening. Sizes range from 4" to 18" diameter.