WarterSong Kitchen Sink Faucet

At first I thought this was the wrong size because I couldn't get it to screw into the metal ball-swivel fitting. I realized the diameter is correct and that there was a leftover fitting from my old head still inside the metal fitting. I used needle nose pliers to grasp that and unscrew it. Once I did that, this faucet head fit in. When I turned it on, the ball-swivel leaked but I was able to solve that by taking out the thin rubber ring in the swivel coupling and replacing it with a thicker rubber ring. That was not in the amazon product but I had some from a showerhead laying around. This created a tight seal and now everything is working perfect. FYI - If you want very strong water flow you can use an eyeglass screwdriver to pop out the little white plastic screen/cartridge under the plastic threads. Hope this is helpful if you run into issues. I was about to give up but was able to fix both of these issues within a few minutes and I am now very happy with the faucet!