Move hot air out of the room : This portable air conditioner seal is installed between the window frame and the window with a pipe, which effectively moves the hot air produced by the air conditioner out of the window , keeping the cold air in the room cools for a long time. Improve cooling performance and save energy Portable air conditioner window seals are made of durable nylon, which can effectively block the entry of hot air, allowing your room to cool cool down quickly in a short time, improving the cooling performance of AC, helping to reduce energy consumption, reduce carbon dioxide emissions, save your energy consumption, save your money. Waterproof function The seal of the air conditioner is made of waterproof nylon, which can also be used in rainy days. Create a cool space for you on a hot summer day. Easy to install : No drilling or tools required, everything you need is provided. Simply stick the AC gasket kit to the inside of the window frame and to the window, remove the AC hose from the window, close it and secure it with the zip ties. You can open or close the window at any time without removing the window seal. Wide Applications The 400cm air conditioner seal kit is suitable for sliding and sliding window types, and fits windows up to 158 inches in circumference. Works with all portable air conditioners.