The Deflecto Corporation HS6W/12 6" Suprr-Vent Louvred Hood supports proper outdoor ventilation by directing exhaust air away from the vent opening. Designed for 6-inch ventilation systems, this louvered hood mounts to an exterior wall and connects with compatible ductwork. Its louvered design opens as air moves outward and closes when airflow stops, helping limit the entry of outdoor... https://www.hnkparts.com/hs6w-deflecto-corporation-6inch-louver