STOP HOT AIR: The seal blocks the entry of hot air for optimal air conditioning Our window seal prevents insects, mosquitoes and rain from entering and provides a closed environment that helps keep your room cooler for longer. HIGH COOLING PERFORMANCE Enjoy cool summer weather with Our product seals the edges of your window even when its open. It surrounds your air conditioners vent duct and blocks hot air return, allowing your portable air conditioning unit to be more efficient and cool your room faster and save money BYE BYE L HOT AIR : The FIBE Weatherproof Window Seal Universal Seal exhausts hot air from your room through the hose of your portable air conditioner by sealing the hose between the window frame and the window sash. SAVE SAVINGS: SAVE your Energy and Money: FIBE air conditioner pipe tight sealing joint greatly reduces energy consumption. Its exhaust ventilation system allows you to LOWER your electricity bills while enjoying efficient cooling thanks to our window closing seal EASY INSTALLATION: 157 inch AC Exhaust Pipe Sealing and Sealing Cloth is suitable for all portable air conditioners and dryers. Compatible with most windows with a maximum perimeter of 400 cm whether crank or casement, you can install your exhaust support in a very SIMPLE way. Number of pieces delivered: 1 White color