Fitment: The hooded wall vent cover cap is used for outdoor air exhaust applications; The diameter of hooded wall vent pipe is 6 inch connecting to exhaust ducts; The length of wall exhaust vent pipe is 8-1/4 inch and long enough for wall mounted installation and easily connect to solid metal pipe or flexible ducting hose; Please measure vent duct diameter to ensure the size is right before purchasing Reliable Protection: Exhaust wall vent cover comes with mesh screen and damper to prevent snakes, foreign objects, cold air and rain from entering the ventilation duct and home Exhaust Vent Cover Design: The angled hood with wide mouth is designed to balance low profile for optimum air and exhaust flow; The exhaust vent cap build in hinged backdraft damper to prevent air backflow when air outlet closed and easily open to allow air flow when working; The baffle of wall cap is designed with sound insulation cotton to reduce noise and provide quiet operation Durable Galvanized Steel Wall Exhaust Vent Cover: Wall vent cover constructed from high-quality 28 gauge galvanized steel featuring rust-proof, anti-corrosion and withstand extreme condition Easy Installation: Wall vent cap is designed with pre-drilled installation holes on the flange for simple installation; Comes with screws for easy outside wall mounting; Comes with a aluminum foil tape used to fix and seal the vent duct pipe connection for max ventilation efficiency; Wide flange ensure stable and secure installation Wide Application: The exterior vent cover fit for most home improvement projects and ideal for kitchen range hood wall vent, external extractor wall vent, kitchen stove hood wall vent, dryer vent, bathroom exhaust fan vent, basement shop wall exhaust, garage exhaust, laundry exhaust vent,shed wall vent, air conditioner AC wall vent, office exhaust ventilation application,ect