Acme Miami ABD-10 10 in. Back Draft Damper - Silver

Damper opens with air flow and closes when the air flow stops. Spring loaded with positive closure and a rubber gasket. Dimensions: 10.25 x 10.5 x 9You may also like Acme Miami AFR-125 5 in. Centrifugal Fan Plastic Housing - 217 CFM - White.