Product Details18 Gauge 5/16 CZ Gem Titanium Threadless Dangle Hidden Helix Earring Add some peekaboo style to your look with this 18 gauge cartilage jewelry. It's made with an 8mm hypoallergenic implant grade ASTM F-136 titanium straight post with a flat disc end. The other end features a simple arch design with a loop of dangle chain that supports a color cubic zirconia gem. It also features a threadless design for maximum comfort on insertion and removal. Don't hide your hidden helix, let it take center stage with this elegantly simple hidden helix jewelry.Specifications18 Gauge (1mm), 5/16" (8mm), ASTM F-136 Titanium Straight Post, Threadless, Cubic Zirconia