Features: -Made of thick polypropylene with built-in steel ring, which has better heat resistance, wear resistance, aging resistance and longer service life -Air vent hose has good telescopic function and flexibility, can be stretched to 150cm, more convenient to use in large spaces to freely adjust the length to meet your needs. -The installation of the air conditioning hose requires no skills or tools, just fully stretch the end of the replacement exhaust hose and slowly twist counterclockwise to a position where the connector cannot rotate. -Can quickly clean the dust on the surface of the exhaust hose by simply wiping it with a wet towel. Specification: .