Perfect for replacement for various portable air conditioners using 5 inch diameter hose. It has been designed to fit most standard Vertical and Horizontal window applications; however, it will be necessary for you to verify the 5 inch diameter exhaust hose will fit your unit exhaust. Easy To Install and remove, no damage to the window. Convenient and Practical; simply assembly it and put it in place between the window and window frame. It can regulate the air exchange efficiently and keep out dust and rain.