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. Durable and water resistant material.And the window seal is water resistant and washable. Easy to install, no need for drilling holes. You don't have to buy window kits, adapters for your hose or additional tools. Suitable for all mobile air conditioners and air-dryer regardless of manufacturer Suitable for all commonly-used window types but unable use it on a Left and right sliding window or door.The window remains fully functional and can be closed and opened as usual.