The Vevor air conditioner wall sleeve is designed to fit standard 42-inch through-the-wall AC units for residential or commercial use. Built from 1.2 mm thick galvanized steel with an anti-corrosion finish, it helps protect the unit from dust, water, wear, and environmental damage. Its ventilated design promotes proper airflow and heat dissipation during operation. The sleeve is made for straightforward installation and provides a secure, clean-looking enclosure for compatible air conditioners.