The Vevor air conditioner wall sleeve is designed to fit standard 26-inch through-the-wall air conditioner models for residential or commercial use. Made from thickened galvanized steel with an anti-corrosion coated surface, it is built for long-lasting durability. The included exterior grille helps promote heat dissipation while protecting the unit from dust, water, and environmental wear. Its snug, weather-resistant design helps extend the service life of your air conditioner. A detailed instruction manual is included for easier installation.