It took a few tries, but I finally got a set to work

As others have stated, the male connection would not fit SunJoe hoses. The company sent me another one which had the same issue. After explaining to the company that the female adapter would not thread on the male one, they worked with their supplier to fix the problem. They sent me a photo of the parts threaded together before they shipped (from China) so I was reasonably confident that the would work when I received them. In a couple of weeks they showed up and they work fine, no leaks.

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