Crafted from ASTM F136 implant-grade titanium, rigorously tested for professional body piercing, ensuring maximum safety and user-friendly application.IMPLANT GRADE TITANIUM HINGED SEGMENT RINGThickness: 16GA (1.2MM), 18GA (1.0MM) OR 20GA (0.8MM) Length: from 5mm to 12mmMaterial: Ti 6Al-4V ELI ASTM F136