NO MORE HOT AIR INCOMES window seal keeps the warm air coming from the hose of your portable air conditioner away by locking the hose between the window frame and the window itself. EASY TO INSTALL NO NEED FOR DRILLING HOLES You don't have to buy window kits, adapters for your hose or additional tools. All you need comes with your 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. 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. UNIVERSAL Suitable for all portable air conditioners and tumble dryersregardless of manufacturer. Whether for windows that open to the left or windows that open to the right, bottom hung windows or skylights, the Window Seal will do the job. Fits window with a maximum perimeter of 300cm/400 CM.