COOL OVER THE SUMMER:- Window seal blocks the return flow of warm air by locking the hose between the window frame and the window itself. At the same time, reduce the cold air leaking out, keeps your room cool for longer, providing you a cool and comfortable living environment. REDUCE ENERGY CONSUMPTION: - Enjoy the environmental life! This window seal contributes to reduce energy consumption and to lower carbon dioxide emissions, which is particularly high in summer due to the massive use of air conditioning. Protecting the environment while saving energy and saving electrical bills! WATERPROOF STRONG ADHESIVE: - Air conditioner window seal is washable and water resistant, keep the rain off on rainy days, and it also leaves out insects, mosquitoes. Come with strong hook tape, you don't have to worry about the adhesive tape coming off any more. EASY TO INSTALL: - No tool or drilling needed. All you need comes with Window Seal! 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. Open the zip and place air hose out of the window. Then close the zip tightly around the hose. Window remains fully functional and can be closed and opened as usual. Additional cable ties are included with the product as additional support and fastening. UNIVERSAL WINDOW SEAL: - Suitable for all portable air conditioners and tumble dryers. Application for Casement Windows, Awning Windows, Hopper Windows, not for Sliding Windows, Horizontal Pivot Windows or Vertical Pivot Windows. Length: 400CM, suitable for windows with a total seal length of less than 400 cm.