[Good Sealing]This kit keeps your room cooler for longer and saves on electricity bills. It effectively diffuses hot air out of the window while preventing warm air from circulating in the room. [Reusable]This window kit is made of plastic, which is not easy to deteriorate and can be used year after year. [Easy to Install and Remove]Suitable for sliding or sliding doors, embed the board into the window track and supplement it with window seals to achieve a good sealing effect. [Adjustable]: Suitable for most vertical and horizontal sliding .