Screw in Ball Rings are designed for larger gauge piercings. these rings are available in a variety of internal diameters,we made from size 10mm 12mm 15mm 17mm 19mm and 22mm so that you can find a suitable fit for your body piercing.If we have not these size listed in our store please do feel free to ask us,we will check our warehouse and give outcome immediately.The Screw in Ball Ring features one ball that screws into the end of the ring, easily fitted and removed.