The Inovate DWV4K Dryer Wall Vent 4" Black provides an outlet for dryer exhaust air to leave the home. Installed through an exterior wall, the vent directs warm, moist air from the dryer to the outside while the cover helps keep the opening protected. Its 4-inch size is designed for compatible dryer vent systems and provides a practical replacement for a damaged or worn wall vent. https://www.hnkparts.com/inovate-dwv4k-4-black-flush-metal-vent-58610/4-DWV4K.html