Move Hot Air Out of Room: This portable ac window seal install between the window frame and the window with a hose, effectively expelling the hot air produced by the air conditioner out of the window, keeping the cold air inside and keeping your room cool for a long time Enhance Cooling Performance & Save Energy: The air conditioner window seal are made of durable nylon material, which can effectively block the entry of hot air, let your room cool down quickly in a short time, enhance the cooling performance of AC, help reduce energy consumption, reduce CO2 emissions, save your power consumption and save your money Waterproof Function: The casement window air conditioner seal are made of waterproof nylon material and can also be used in rainy days. Create a cool space for you on sweltering summer days Wide Application: The 400cm air conditioner crank out window kit is suitable for both push-out and pull-in window types and will fit windows up to 157 inches in circumference. Suitable