1. Portable Air Conditioner Window Vent Kit, Portable Air Conditioner Window Sliding Kit Plate, Adjustable Length Portable AC Vent Kit 2. Wide Compatibility: The portable air conditioner window ventilation kit includes 4 boards with a total length of 43cm and a maximum adjustable length of 140cm to meet the needs of different window heights. 3. Durable Material: The portable air conditioner window vent kit is made of durable PVC, lightweight, easy to install and remove, suitable for use at home or office. 4. Durable Material: The portable air conditioner window vent kit is made of durable PVC, lightweight, easy to install and remove, suitable for use at home or office. 5. Strengthen the seal: There is a gap between the fixed plate and the adjustment plate, because the adjustable plate is narrower than the fixed plate. Comes with sealing tape, which is affixed to the junction between windows and sealing panels, effectively insulating hot air from entering the room and securing each