Strong and Durable: The drain hose is made of reinforced polypropylene with an integrated high quality steel ring. Better resistance to heat, wear, aging and longer life. It can withstand hot airflow for a long time. Easy to install: Fully stretch both ends of the exhaust hose and slowly rotate clockwise to reach a state where it does not cannot rotate along the fitting thread. By inserting the fitting into the air conditioner, it attaches firmly for high quality. Clockwise: Our AC pipe thread is clockwise and has a diameter of 15 /13 . Fits most portable air conditioners. Please measure and compare your portable air conditioning fitting before purchasing. Longer and 203.2: Telescopic and flexible AC hose. It can be stretched up to 203.2, more convenient for large spaces. Fully retractable to 35.6 for easy storage. Unlimited connection: The ends of the two drain hoses can be tightly connected and have good sealing, no leakage. You can put together several drain pipes of any length according to your needs.