6 inch diameter (5.9") LH threaded(counter clockwise) coupling to reliably repair a tear in your hose or connect two portable air conditioner exhaust hoses together. Many people (including me) have tried tape to connect two hoses only to have it eventually come apart and blow hot air into the room you are trying to keep cool. NO more struggles connecting hoses together, this coupling works perfect!!! Listing is for the coupling only. Hose not included! Custom sizes available!! Feel free to message me to discuss.