16g 8mm septum ring / 16g 8mm helix hoop:16 gauge (thickness: 1.2mm), inner diameter 8mm ( 5/16 inches ). Please check the inside diameter carefully. 16 gauge 8mm hinged nose rings hoop: 316L surgical steel, polished very well, comfortable to wear without sharp edge. Sold individually. It can be used as nose rings hoop, septum jewelry - septum ring / septum clicker, lip rings, helix earrings, cartilage earring, rook earrings, ear lobe earrings hoop. Saves time - easy to open and close the click closure by hand, Not require a tool.And it's still tight after long-term use, needn't to worry about lost when bathing, walking or exercising. Size information: 16 gauge (thickness: 1.2mm), inner diameter 8mm ( 5/16 inches ). Material: 316L surgical steel