One Internally Threaded Grade 23 Titanium Curved Barbell - select gauge/length from the drop down menu All 16g pieces have 3mm balls, all 14g pieces have 4mm balls Material: Solid grade 23 titanium, crystal gems. 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.