The Lambro black ABS plastic roof bath fan exhaust vent kit featuring 4 inch x 8 foot UL 181 air connector is ideal for venting through the roof. This kit is used for bath fan exhaust and other general venting applications that require moist air and humidity from exiting the home. The roof vent allows for maximum airflow while reducing back flow of exhaust air. The vent can be painted to match your home's trim color.