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 2 set household products:1 x air-conditioning exhaust pipe & 1 x air-conditioning pipe interface (flat mouth) Made of environmentally friendly polypropylene, no odor. Sturdy and long-lasting. A perfect replacement for your cranked portable AC exhaust hose