5.1 Inches Anti Clockwise: This AC exhaust hose vent is 5 inches outer diameter and anti-clockwise thread direction, please check to make sure it will suit for your AC unit before purchase. Up to 60 Inches Length: Our ac hose is expandable and it will be expeand to 80 inches to offer the length you need through wall or window and also can be shorten to 15 inches for easy storage. Long Lasting Design: The exhaust ac hose is made of hi-gh quality polypropylene, combine with a steel inside,which made it flexible and heat wear resistance even you using for years without leaking. Easy Installation and Extent: You just need to rotate anti-clockwise the hose to your ac couple and then fix the coupler to your ac unit. Important Notice Before Purchasing: please measure the size and the twisting direction of the hose you need. Our hose goes Counter-Clockwise twisting direction and the diameter is 5.1 inch, please confirm it compatible to your air conditioner models before purchase