About This Stud Simple yet refined, this diamond-shape flat back stud brings clean lines and modern elegance to your ear stack. Designed to sit flat and secure, it’s a go-to piece for 24/7 wear. 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. Each piece is set with AAAAA-grade cubic zirconia, giving a super-sparkling shine that lasts. Plus, it’s completely tarnish-free, ensuring your jewelry stays beautiful and brilliant over time.Details - Sold as a single - Bar Gauge and Length: 16G-6mm. Need extra post? You can purchase additional posts [here]. - 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 - Front Size: 4mm*4mm