The Lambro 3-1/4 In. x 10 In. plastic exhaust vent is ideal for venting through the wall. This vent is used for bath fan exhaust, range hood exhaust, microwave exhaust and other general venting applications that require moist air and humidity from exiting the home. The wall vent allows for maximum airflow while reducing back flow of exhaust air. The plastic vent has a UV additive to prevent premature fading due to the sun. The vent can be painted to match your homes trim color.