Hypoallergenic and Safe: Our titanium flat back earring is crafted from medical implant grade F136 titanium and is nickel and lead free. Titanium stud earring has lower allergenicity than stainless steel and is lighter in weight, offer a comfortable and safe option for individuals with sensitive skin 1PC Piercing Stud: Sold as a Single Piece. Post Thickness =18G (1.0mm) ;Post Length: 1/4"(6mm) , 5/16"(8mm) ; you will receive: 6mm post × 1, 8mm post × 1,stud top × 1 Professional Design: The unique design of the internal threaded guide column at the front allows for easy alignment of holes and easy installation on the top. The internal thread design enhances stability and reduces the possibility of titanium perforated earring falling off. Flat back design ensures a comfortable experience during sleep, sports activities, or showering Versatile Use: Our G23 titanium piercing jewelry is suitable for various ear areas, including cartilage, tragus, helix, conch, and lobe. The post can also serve as nose piercing jewelry or lip piercing jewelry for medusa, monroe, labret. Ideal gifts for body piercing enthusiasts Customer Service: If you have any questions, please feel free to contact us. Your satisfaction is of utmost importance to us, and we want to ensure you have a positive experience with our piercing jewelry