DongZhi of Titanium Jewelry Ltd. is a professional titanium jewelry factory specializing in hypoallergenic titanium jewelry, we use ASTM F136 ( Ti-6Al-4V eli ) and F67 ( Pure Titanium ) materials. We are committed to building lasting partnerships with jewelry brands around the world who value our ability to customize their designs for production and provide exceptional quality that they are truly proud of. We are committed to using titanium to create body-friendly jewelry. These pieces of jewelry can have a positive impact on our customers for years to come.