【 ✅EXTENSION HOSE】：Design to enables connections to exhaust hose
【 ✅5.9IN SIZE】：The duct adapter is 5.9'' in diameter, Fits to various portable Air Conditioners models using 5.9'' diameter hose,and the outlet is Square
【 ✅DURABLE MATERIAL】：The Interface is constructed from Polypropylene,anti-aging,anti-leakage
【 ✅EASY INSTALLATION】：Easy to install and remove on the back of the portable air conditioner.No need other tools

The purchase link: https://www.amazon.com/LBG-Products-C...