Material: Grade 23 Titanium. You needn't worry about allergies,BUT IF YOU'RE EXTREMELY SENSITIVE TO METAL OR CAN ONLY WEAR SOLID TITANIUM, suggest you don't try.
Sold by piece.
Saves time - easy to open and close the click closure by hand, Not require a tool.And it's still tight after long-term use, needn't to worry about lost when bathing, walking or exercising.
If you have any questions, you can feel free to contact us.
