I had the nylon plastic one and the threads didn't hold up and it would fall out. Didn't last one use. This one, however, I feel will outlast my fish tank. Came with a gasket. Exceptionally well made. Looks to be machined from pipe stock, not that sintered metal casting junk from China. Someone HERE in the USA made this thing by hand in a production machine shop and it shows.Adapter has male and female threads cut in the faucet side. Fits regular size aerators. Won't fit smaller aerators so be sure of your aerator size.One note: The bottom thread by the knurling on the hose side, because of the machining process, is really sharp and cut me while I was installing the adapter in the faucet. I'm going to file the sharp area a bit, but using a dish towel to tighten and loosen this adapter will protect your fingers. I'm still so impressed that the sharp edge doesn't cause this to lose a star.
Rating: [5 of 5 Stars!]