Universal Clockwise Counterclockwise threaded coupler connects to a threaded hose. Exhaust Hose Coupler provide a best solution for putting my exhaust through the wall or your window. | Ac air conditioner exhaust hose coupler:secure fit on 5-inch tubes with no leak. Compatible with Outer diameter 130mm. Inner diameter 5 inch. | Portable ac flex duct coupler inner: diameter does not take the thread into consideration and is the maximum diameter of a compatible tube. | Using this 5 inch portable connector to extend the exhaust duct no longer needs to distinguish between left-handed and right-handed. Left-handed and right-handed can be used. One left-handed and one right-handed can also be connected 5 inch or 5.12 inch is same product. | User-friendly design: universal model, suitable for all portable air conditioners with 5.12" diameter hoses.