ChiMunllin 16G 18G Internal Thread Stud Earrings for Women Surgical Steel Labret Piercing Jewelry for Tragus Helix Rook Conch Monroe Lip Labret Jewelry Internal Thread Upgraded Design: Extra long thread pin, much easier to locate and screw in Material: Made of surgical stainless steel, lead and nickel free, smooth surface, comfortable to wear Muitiple Using: These Flat Back Earrings Studs can be used for lip rings, monroe lip studs, medusa piercing jewelry, nose stud, helix erarrings, tragus piercing jewelry