The shortened length is 16 inch / 40 cm. You can extend it to 78 inch / 198 cm max. exhaust hose is longer than the Zipper Closure hose making it more flexible to use in a large space Stretch the hose gently. Line up one of the ends with the window connector and rotate the connector clockwise to snap into the hose. Then rotate the hose clockwise to the hose connector Made of environmentally friendly polypropylene, no odor. Sturdy and long-lasting. A perfect replacement for your cranked portable AC exhaust hose Universal size: hose diameter is 150mm (5.9 inch) to choose, fits to various using 5.9 inch diameter hose. and Portable: the air exhaust hose is made by polypropylene with good flexible, which is a good replacement when the essential vent hose has cracked. Easy to install: gently extend out the exhaust hose to meet up with the existing hose, line up with the both ends, snap into place. Applies to: Workshop, automobile exhaust, sewer, shipyard, Air Conditioner It not shrink after