Ball closureMaterial: the mixed belly bottom ring made of high quality bioflex acrylic material which is nickel-free and lead-free that you can long time wearing without worries.Size: thickness of barbell is 14 gauge/ 1.6 mm, length of bar is approx 11 mm/7/16inch, diameter of the top ball is 5 mm, the bottom ball is 8mm. The balls do come off both ends, easy to screw on and off, lightweight and soft that comfort for your daily wearing.Package Includes: 100pcs bioflex acrylic belly button rings, there was not one duplicate and a wide range of colors and styles. Wearing different everyday by your mode, give a focus daily life!Applied Occasion: The belly barbells come in various styles and bright colors. It suit for many occasions, such as swimwear, summer short-sleeve mini T-shirts and more. These navel rings will make you more dazzling and charming in the crowd.Wonderful Gift: it is a colorful & variation pattern belly rings, a lot belly bottom rings means you can use it for your bussiness, daily wearing, it is a good choice to send it as a gift for your friends, family, and others wearing on party, graduation, birthday, Christmas, anniversary, valentine's day, decorate your and express yourself individual.