NO MORE HOT AIR INCOMES - This window seal for air conditioners can stop hot air by locking the hose between the window frame and the window itself. To keep your room more cool. WIDE APPLICATION - Window seal for portable ac units suitable for portable mobile air conditioners, dryers, exhaust dryers, and dehumidifiers. The airlock is only suitable for commonly-used tilting windows or wings. YQing Window Seal will do the job. Fits window with a maximum perimeter of 400 CM. EASY TO INSTALL – You don’t have to buy window kits, adapters for your hose or additional tools. Simply apply the adhesive hook tape to the inside of your window frame and to the window itself. Attach the window seal to the hook tape. Then, open the zip on the window seal and place your air conditioner hose out of the window. At the end, close the zip tightly around the hose. Simple as it is. Window seal for portable air conditioner that is simply zipped in place between the window and the window frame and can regulates the air exchange efficiently and locks out pests and keeps out the rain. The window remains fully functional and can be closed and opened as usual. And the window seal is water resistant and washable.