Please measure the size before purchasing It's reliable,Great for extending the length of the tube, but without letting the heat escape. It has a diameter of 5.9 inches, and the counterclockwise thread means it only works with 5.9 inch/15 cm portable air conditioning connections. Our hose has a anti-clockwise thread (which means you turn anti-clockwise when attaching the hose to the unit). This fits most 5.9inch/15cm models of air conditioners but make sure before purchasing that you check your AC unit manual. Features 1.Anti-Clockwise Thread 2.Quick Installation 3.Long Lasting 4.High Quality Polypropelene 5.5.9"/15CM Diameter