Universal compatibility: The exhaust hose is suitable for all types of portable air conditioning models. As long as you use the same hose, the connector has a diameter of 15 cm (outer outer edge) and its thread is counterclockwise. Easy to install: Gently extend the exhaust hose, meet the existing hose, align the ends, rotate clockwise until it clicks into place, easy to install. Suitable: this is great suitable for when a Air Conditioner still runs great,the essential vent hose has cracked,then you needed to replace it. and sturdy: The hose is made of polypropylene for flexibility, durability and portability, which is a good alternative to prevent air conditioning from leaking when the basic exhaust hose breaks. Free stretch and shrink: The hose is retractable, shortens to 28cm and can be extended to 150cm, making it easy to extend the length of the exhaust hose to fit anywhere you want. Note: Before you buy, make sure your portable air conditioner is the right size and thread.