2pcs F136 Titanium Horseshoe Rings with 1pc Taper Changing Tools for Nose Septum Lip Rings Piercing Jewelry Cartilage Tragus Forward Helix Conch Earrings for Women Men Post Gauge: 18G=1.0mm, Inner Diameter: 8mm=5/16in. Ends CZ Diameter: 3mm. Made of Standard ASTM F-136 Titanium no worry about skin allergy problem; rust resistant, Light Weight, highly polished finishing craft created, Comfortable for long time wearing. Gift for Birthday, Christmas Day, Anniversary, Valentine's Day, Wedding, Vocation , Fancy Ball, Halloween, Party and more.