【Universal Suitable】: 400cm window seal is suitable for all common window types and sizes with a maximum circumference of 400cm but cannot be used for left and right sliding window or right sliding door.You can open or close the window at any time without destroying the air conditioning window seal.【Efficient and Energy Saving】: Using this mobile air conditioner window seal can reduce energy consumption by blocking hot air from outside the window and allowing the indoor temperature to reach and maintainquickly reach the ideal temperature.Air conditioner window seal can optimize air conditioner performance, energy saving and environmental protection.【Easy to install】: The most important thing is that you don't have to drill.First install the Full Frame Velcro fastener inside your window frame and onto the window itself then attach the window seal to it.Finally, open the zipper and secure the tube firmly.In a few minutes you can be done with it.【Waterproof & Durable】: The window seal helps reduce energy consumption and carbon dioxide emissions,The treatment glass is washable and water resistant, it prevents rain from falling on rainy days and it also letsinsects mosquitoes outside.Pleasantly cool air stays in the room and unwanted warm air is diverted outside. Come with a sturdy hook strip so you no longer have to worry about the adhesive strip coming off.【Versatile】: Thanks to the two zipper openings, the window seal is suitable for all portable air conditioners, tumble dryers, condenser dryers, exhaust dryers and independent dehumidifiers. And for windows, roof windows, tilting windows.