Suitable for sealing a window up to 400 cm wide. The latest sealing cloth for portable air conditioners and dryers with a zipper and self-adhesive closure. This window seal keeps warm air out of the portable air conditioner's hose by locking it between the window frame and the window itself. This window seal keeps insects, mosquitoes, and rain out, creating a "closed environment" that keeps the room cooler for longer. Get more out of your air conditioning. By sealing the window, you can enjoy cooler air on hot days. The hose nozzle slides and blocks the warm air. This makes the portable air conditioning unit more efficient and cools your room faster. Universal use. Suitable for all portable air conditioners and dryers, regardless of manufacturer. Whether it's for windows that open to the left or right, down-hung windows, or skylights. This product is not suitable for tilt and turn windows. Reduce your air conditioner's energy consumption. This window sealing solution is also a very efficient way to reduce energy consumption. The window seal helps reduce energy consumption and carbon dioxide emissions, which are especially high in the summer due to the heavy use of air conditioning. Very easy to install without drilling. No window kits, adapters, extra hose, or tools are required. Everything you need is included with this air conditioner window seal! Simply apply the self-adhesive tape to the inside of the window frame and to the window itself. Attach the window seal to the hook tape. Then, unzip the window seal and insert the air conditioner hose from the window. At the end, zip it tightly around the hose. Easy to install.