About This Applicable size: the wall vent cover is 7.7" in diameter and fits a 8" dryer vent hoses or metal pipes. Please confirm the calibre of the vent pipe before purchase to avoid the size not applicable. Quality Material: The 8 inch exhaust vent cover is also made of high quality metal, which is sturdy and durable, rustproof and corrosion-resistant. The metal vent covers for wall has a longer service life compared to the plastic model. Function: HG Power 8 inch vent cover outdoor has a removable mesh to keep debris out. The clothes dryer replacement vents are equipped with a rubber ring and a one-way check valve on the inside to effectively reduce noise and block back air. The vent is easy to open for maximum exhaust flow. Easy To Install: Easy to install with standard tools. Simply insert the wall vent cap into the pipe and screw it to the wall. Versatile Use: Exterior vent covers are beautifully shaped and suitable for houses, range hoods, kitchens, offices, garages, sheds, campers, air conditioners, and RVs. Ideal for outdoor exhaust and ventilation.