Introduction This robust galvanized PTAC wall sleeve fits Most through-the-wall air conditioning units and helps to insulate the unit in addition to reducing air conditioning noise. Fitted with an external grille that prevents dust, debris and other small animals from being drawn in while the air conditioner is running. Features Main Dimensions: Total size: 40.2”L x 15.9”W x 15”D Inner frame size?42.5”L x 16.6”W x 15”D High Quality Materials: It is made of high quality glvanized steel, rust and corrosion resistant, with a long service life Wide Adaptability?This wall-mounted AC cover is suitable for most through-wall air conditioning units and provides effective noise and acoustic reduction. Design Upgrade: Dust, debris and other small animals can be inhaled when the air conditioner is running, so we're equipped with an external grille. Easy Installation: Equipped with tools and instructions, you can complete the assembly easily. After-sales Service: Any questions, please contact our 24/7 online customer service. Specifications: Material: Steel Total Size: 36”L x 20”W x 15”D Inner frame size?34”L x 19”W Package Content 1 x PTAC Wall Sleeve 1 pack of Screw Accessories