The plug is used m.in. In KEW and Nilfisk Alto washes (Neptun, Poseidon) on combining a gun or pianine gun. It also applies as an additional plug in a quick-connector, which we offer on our other auctions. The plug can be assembled to accessories for M22 thread or directly to thread 1/4 "(after reduction). Bisanti.
And this auction you buy 1 Kew plug together with M22M-1 / 4M reduction.