The attractive Broan 636AL roof cap in a natural aluminum is the perfect finish for your ventilation system. The built-in back-draft damper eliminates cold air from entering the home, and the bird screen stops unwanted visitors from gaining entry. Aluminum construction means no unsightly corrosion.

　　- Built-in back-draft damper and bird screen

　　- Made of durable aluminum

　　- For 3 in. or 4 in. round duct

　　- Natural finish

　　- MFG Model # : 636AL

　　- MFG Part # : 636AL