14G Synthetic Opal ASTM F-136 Implant Grade Titanium Internally Threaded Bridge BarbellProduct Details Hypoallergenic jewelry for sensitive skin 14 Gauge Synthetic Opal ASTM F 136 Titanium Internally Threaded Bridge Barbell Bridge piercing barbell made with Implant Grade Titanium with stunning synthetic opal charm ends. Comfortable bridge jewelry featuring two internally threaded end charms. This 14 gauge bridge barbell can also be worn as a nipple piercing barbell if the size is right. If ordering for a nipple piercing, please purchase