Internally Threaded Implant Grade Solid Titanium HorseshoeGreat for Septums, Daiths, Helixs, Tragus, Nipple, Web, Labret, etc. From 14g to 00g (10mm). And diameters 8mm to 16mm --All of our titanium jewelry, is completely nickel-free and safe to use for customers with a nickel allergy.-Made with ASTM F136 implant-grade titanium. Tested for utmost safety and ease of use in professional body piercing applications