This portable air conditioner window kit contains all the accessories you need. The portable air conditioner window vent kit includes 4 plates with a total length of 43 cm/16.93inch(about) and a maximum adjustable length of 140 cm/55.12inch(about) to meet the needs of different window heights. Our portable air-conditioning window sliding kit plates are different in design, and they feature adjustable rails, and they are solid, so there is no need to worry about separation between the 2 plates. Vertical and horizontal installation methods. The AC window kit is made of durable PVC material, which is lightweight, easy to install and remove, suitable for home or office use. There is a gap between the fixing plate and the adjusting plate, for the adjustable plate is narrower than the fixing plate. It comes with a sealing tape, which is attached to the joint between the window and the sealing plate, effectively preventing hot air from entering and fixing each plate.