[Internally Threaded Studs] : This internally threaded cartilage helix earring flat back with crescent moon boasts an exquisite design, paired with dazzling sparkling CZ, offering a blend of simplicity and elegance. [Standard Flat Back Piercings Size]: Gauge = 16g(1.2mm), bar length = 8mm(5/16''). The flat back earrings are normal and standard size for cartilage helix piercing jewelry. [Safe G23 Solid Titanium] G23 Solid Titanium Helix Piercing Jewelry, Hypoallergenic, Nickel & Lead-Free, Can Be Worn Even on New Piercings, Good for the Sensitive Skin, Long Use Time [Internally Threaded Helix Earrings] : Internally Threaded Helix Piercing Jewelry is Often Much Safer with Much Higher Quality, This Is a Much Easier Jewelry Removal And Insertion That Causes No Tissue Damage. [Perfect After-Sales Service] Highly Specialized Body Jewelry. Production / Designing / Creating.If you have any questions please feel free to get in touch with us and we'll handle them immediately thus providing you with superb pre/post satisfactory services. At OUFER we sincerely believe that the right piece of jewelry will not only deliver beauty, but also confidence and purity. Therefore, we have a passion in exploring piercing jewelry with the purest of heart for everyone, bringing them wellness and confidence while they’re pursuing whatever makes them Happy. Our mission is making diversified and quality body jewelry more accessible and relatable for all. We get body piercing right in a dependable and simple way, and keep bringing safe, comfortable yet easy experience for our customers, leaving them with feeling of safety and comfort and making it simple for everyone to express themselves. Oufer, where you can simply get the right piercing jewelry. Our vision is Oufer believes the right jewelry delivers beauty, confidence, purity and wellness.