CLOCKWISE: Our ac hose thread is anti-clockwise and has a diameter of 5.9 inches. Suitable for most portable air conditioners. Please measure and compare your portable air conditioner coupler before purchasing. STRONG & DURABLE: The exhaust hose is made of thickened polypropylene with a built-in high-quality steel ring, which has better heat resistance, wear resistance, aging resistance, and longer service life. It can withstand long-term hot airflow. LONGER & 59 INCHES: Our ac hose has good telescopic function and flexibility. It can be stretched up to 59 inches, which is more convenient to use in large spaces. It is fully retracted to 11 inches for easy storage. EASY TO INSTALL: Fully stretch the two ends of the exhaust hose, and slowly rotate anti-clockwise to a state where it cannot rotate along the thread of the coupler. Inserting the coupler into the air conditioner, it can be firmly fixed. INFINITE CONNECTION: The ends of the two exhaust hoses can be tightly connected, and have good tightness and no leakage. You can assemble multiple exhaust hoses into hoses of any length according to actual needs. (Only 1 pc exhaust hose, no coupler)