8 Pieces of 16 Gauge (1.2mm), 1/2 Inch (12mm) inside diameter. Black Anodized Surgical Steel Captive Bead Ring with 4mm Ball. Made of The Finest 316L Surgical Stainless Steel In Nickel Free Process. Captive Bead Ring are very diverse jewelry that can be used for ton of piercings. All body jewelry is 100% guaranteed for craftsmanship and quality which is totally unique and very hard to find. The anodized jewelry is very unique product, it is dipped in a chemical electrolyte and then exposed to an electrical current, which creates an array of colors depending on voltage and light refraction so the color will be individual in each piece (every piece will have different color). We have hand-checked by every item that they make you look very attractive and never ever fall apart to embarrass you.