Crafted from ASTM F136 implant-grade titanium, rigorously tested for professional body piercing, ensuring maximum safety and user-friendly application.IMPLANT GRADE SOLID TITANIUM INTERNALLY THREADED CZ PRONG SET LABRET/MONROEMaterial: Ti 6Al-4V ELI ASTM F136Sold By: PIECEThickness: 16GA (1.2MM) Length: 1/4" (6MM) OR 5/16" (8MM) OR 3/8" (10MM) Ball Size: 2MM OR 3MM OR 4MM