●Improve efficiency: this adapter can connect the exhaust hose firmly to your air conditioner, which helps to quickly dissipate the room heat. This exhaust hose connector works quietly and does not affect your normal life and calm and can be used safely. ●Wide applicability: channel connections are round at one end and square on the other and can be installed on the back of many portable air conditioners. Fits a 5.9 inch diameter exhaust hose and can be mounted with both clockwise and counterclockwise hoses. ●Easy to use: the exhaust hose connector for portable air conditioners has a thoughtful and practical universal thread design, and the left and right hand can be turned clockwise or counterclockwise for connection, and there is no need to distinguish between the left and right air conditioner connectors to extend the exhaust pipe. ●Premium material: the exhaust hose fitting kit is made of ABS material, which is lightweight and strong, durable and flexible and cannot be easily damaged. It is suitable for long-term use and saves frequent replacement. ●Good service: If you have any questions about our products, please feel free to contact us. We give you a satisfactory answer and strive to provide the best service and the highest quality products.