About This Stud A delicate duo-crystal cartilage stud featuring two sparkling stones in a refined stacked design. Perfect for helix, lobe, and everyday ear styling. This jewelry is crafted entirely from ASTM F-136 implant-grade titanium, making it 100% safe for new piercings and trusted by piercing studios worldwide. Details - Sold as a single - Bar Gauge and Length: 18G-6mm. Need extra post? You can purchase additional posts [here] - Crystal AAAAA grade cubic zirconia for brilliant sparkle - Amethyst Purple AAAAA grade cubic zirconia for brilliant sparkle - Emerald Green AAAAA grade cubic zirconia for brilliant sparkle - Aquamarine AAAAA grade cubic zirconia for brilliant sparkle - Closure: Push in - Made of solid implant grade titanium / Gold version is coated in 18k gold PVD Plating - Flat Back Disc Size: 0.15" (4mm) - Waterproof / Hypoallergenic / Nickel Free