Metal This heart belly ring is made of ASTM F136 implant-grade titanium. Implant-grade titanium is a highly preferred material for body jewelry as it is durable, hypoallergenic, nickel-free, non-corrosive, safe from contamination, and adaptable to our bodies. Details Materials: ASTM F136 implant-grade titanium, 5A cubic zirconia; Thickness: 1.6 mm (14 gauge); Length: 10mm; Metal color: Silver; Gem color: Clear, blue, pink, rainbow; Gem shape: Heart; Closure: Internally threaded; Quantity: 1…