With its easy-to-install design, this Imperial 4-in Louvered Vent Hood is ideal for clothes dryer and bath fan venting. The vent hood is made of UV-resistant plastic that resists fading and discoloration from the sun, and is paintable to match the exterior of your home. The louvers open easily for maximum airflow, and close when not in use to help prevent back drafts. A pest guard helps keep birds and rodents from entering the home, and is removable for easy cleaning. This vent hood comes complete with an aluminum mounting pipe for ease of installation.