💙316L Surgical Steel: Hypoallergenic and Nickel Free, Lead-Free, Cadmium-Free, Safe and Healthy. Helix clicker rook piercing jewelry will never corrode and turn green. No sharp edges, well-polished, and comfortable to wear. 💙Save Time: Not require a tool. It's still tight after long-term use, so you needn't worry about losing it when bathing, walking, or exercising. The Daith earring has great flexibility. It's easy to take on and off by hand, open it gently and hear a "ding," and you're done. 💙Gauge: 16G(1.2mm/0.047in),Inner Diameter:10mm/0.394in, 8mm/0.315in, common piercing size.Please carefully confirm the right size for your piercing. 💙Multiple Wearing Parts: 16G heart piercing jewelry can be used as helix earrings, cartilage earring, rook earrings, conch piercing earrings, hinged tragus earrings, septum ring, lip rings. 💙Elegant Packaging: Package contains two pieces(8 mm &10 mm). It comes with a beautiful black drawstring velvet pouch and is ready to give. You can give it as a good gift to your lover . It is also a great idea for yourself.