Value Pack：1pcs Threadless Helix Cartilage Tragus Earring Stud 16g 18g Push Pin Flat Back Helix Tragus Cartilage Jewelry, Easy To Put In. Come With 6mm post and 8mm post Normal Size：Bar Thickness: 16G=1.2mm & 18G=1.0mm; Length: 5/16"(8mm) & 1/4"(6mm); Material：ASTM F136 Titanium and certified by SGS, threadless (Push Pin), hypoallergenic, 5A cubic zirconia, and Hight Quality 18k Gold Plated. Exchange：If you bought the threadless flatback stud in TOMIDES, you can exchange the top or post. e.g., the push pin top can match 18G & 16G thickness and the different lengths. Occassion：High Value 16g Flat Back Helix Tragus Cartilage Piercing Jewelry. Best 16g Forward Helix Earrings. Use for Cartilage, Conch, Helix, Flat, Lobe etc Cocharm Service：We hope every one of our customers to love our jewelry as much as possible. Please let me know if you have any questions, we will solve the problem for you within 24 hours. 16G Flat back Earring Stud ASTM F136 Titanium 6mm 8mm Push In Fit Threadless Dainty Cartilage Piercing Jewelry for Women for Tragus Helix Conch Lobe Lip Value Pack:1pcs Threadless Helix Cartilage Tragus Earring Stud 16g 18g Push Pin Flat Back Helix Tragus Cartilage Jewelry, Easy To Put In. Come With 6mm post and 8mm post Normal Size：Bar Thickness: 16G=1.2mm & 18G=1.0mm; Length: 5/16"(8mm) & 1/4"(6mm); Material：ASTM F136 Titanium and certified by SGS, threadless (Push Pin), hypoallergenic, 5A cubic zirconia, and Hight Quality 18k Gold Plated. Exchange：If you bought the threadless flatback stud in TOMIDES, you can exchange the top or post. e.g., the push pin top can match 18G & 16G thickness and the different lengths. Occassion：High Value 16g Flat Back Helix Tragus Cartilage Piercing Jewelry. Best 16g Forward Helix Earrings. Use for Cartilage, Conch, Helix, Flat, Lobe etc Cocharm Service：We hope every one of our customers to love our jewelry as much as possible. Please let me know if you have any questions, we will solve the problem for you within 24 hours.