Features: 1¡¢APPLICABLE HOSE: This exhaust connector adapter is for 5.9in?6in air conditioning exhaust hose, suitable for both clockwise and counterclockwise hoses. 2¡¢MAIN PURPOSE: This exhaust adapter is mainly used to tightly connect the exhaust hose to the air conditioning unit to ensure efficient cooling of the room. 3¡¢SQUARE TO ROUND: The fitting adapter is square to round design, which can be easily installed on the back of the portable air conditioner without drilling holes. 4¡¢ABS PLASTIC: Using excellent ABS, which has light weight and good toughness, wear and aging resistance, can be used for a long time without damage. 5¡¢EASY INSTALLATION: This hose adapter is compact and easy to install without tools, tape or any other window air conditioner accessories, convenient and durable. Package included: 1 x Exhaust Hose Coupler