American Aldes 6" Exhaust Wall Hood With Damper.Exterior wall hood with 6" duct connection. Made of heavy gauge G90 galvanized steel. Used in exhaust ventilation and dryer venting systems. These hoods should be used when back draft dampers are not present at other locations within the duct system. A=6"B=3"C=4"D=6"E=10"F = 9"
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