<p>【Keep The Cool Air in】In summer, there is often a gap between the window and the sealing plate so that hot air enters your room through this gap. Therefore, we provide sealing tape in the packaging. Post it in the gap to ensure the most efficient operation of the portable air conditioner and prevent hot air from entering the room from outside. You can enjoy a comfortable family life, working and nice sleep. Prevent mosquito bites, keeps the insects outside.</p><p>【Adjustable Length】 This window ventilation kit includes three 42cm/16.5in PVC panels. The adjustable range is 63cm-120cm / 25in-47in, so you can freely stretch and adjust the length. And it is suitable for 13cm/5.1 Inch Exhaust Hose. It works perfectly with vertical and horizontal sliding windows. Note: Please check your window size before buying.</p><p>【Easy to Install】 You just need to put each panel together and slide them to the desired length. No need for expensive installation kits and tools. No need to pouch a hole on window, simply connect the exhaust hose(NOT INCLUDED) with coupler to the board's hole, press and push it in. Finally, lock the attached screws to get a strong AC window sealing strip! It will be very sturdy! Don't worry about the separation between the two plates.</p><p>【Portable and Reusable】 Ventilation Kit is made of durable PVC material, lightweight and portable design, so you can install or remove it effortlessly in your home or office. It designed to save energy and prolong service life. You can also remove it and install it again next summer to save your money!</p><p>【Widely applications】 It can be perfectly combined with portable mobile air conditioners. The three windows pushed horizontally to the left, right, or downward are suitable. Note: but it is not suitable for sliding windows in and out.</p>