1pc Septum Clicker - select desired gem color from the drop down menu Materials: 316L surgical steel, Gem is synthetic opal Measurements: internal diameter is 9mm, bar length is 6mm and diameter at the widest external point is 12mm EVERYTHING we sell is brand new, never worn. Feedback: Your satisfaction is important to us. If for any reason you feel like we don't deserve a 5-star rating in every category please allow us the opportunity to rectify the situation. While many situations such as postal delays are out of our hands, we will do whatever we can to alleviate any problems that may arise.