This is a beautiful deep purple belly button ring made with high grade solid TITANIUM 6ALV-ELI (Grade 23) IMPLANT GRADE. The double jewel design is deep purple and matches entire piece. The top bead size is 4mm and bottom bead size is 6mm.Titanium navel rings are lightweight, corrosion resistant, and less likely to react with bodily fluids! For extra safety your titanium body jewelry can be sterilized in an autoclave.