Clear CZ Gem ASTM F-136 Implant Grade Titanium Threadless Double Mount Belly RingProduct Details Hypoallergenic jewelry for sensitive skinClear CZ Gem ASTM F 136 Titanium Threadless Double Mount Belly Ring Have it all in one elegant package with this 14 gauge navel ring. It's made with a 3 8 inch ASTM F 136 titanium curved barbell. The top end is a flower charm set with a clear cubic zirconia gem. The bottom end is a matching 8mm clear cubic zirconia gem and it even features a threadless design for maximum ease of insertion and