MATERIAL: Made with surgical steel. Surgical steel is a commonly used metal for production of many different types of body jewelry.
MEASUREMENTS: Gauge Size: 18 Gauge (1mm), 16 Gauge (1.2mm) or 14 Gauge (1.6mm). Inner Diameter: 6mm-12mm. These are going to very difficult to open/close without ring opening/closing pliers, so we do recommend being aware of that.
WHAT'S INCLUDED: 2 D-shaped captive bead rings are included with your purchase. Available in a variety of sizes