This is a super-hot belly button ring solid made with TITANIUM 6ALV-ELI (Grade 23) IMPLANT GRADE with a unique lava stone. This belly ring is 14 gauge and measures 10mm-3/8 inches. The top bead is 5mm and the bottom is 8mm. 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.