316LVM surgical steel or PVD titanium and metal alloy N/A External Nipple Each piece is sold individually. The Bee Nipple Barbell is a high-quality piece. The design best suits nipple piercings. This barbell unscrews from one side. Insert the barbell through your piercing and screw the end back on. If you need some help getting the barbell through, a dab of will get it through. 316LVM surgical steel is a low carbon vacuum melted. This process sucks the nickel from the metal. Nickel is a common cause of metal allergies. Please note: this process cannot remove all the nickel. As a result, a small number of people react to 316LVM surgical steel. If this is you, we recommend titanium body jewelry. Blackline is a titanium carbide PVD coating. PVD stands for Physical Vapour Deposition. In other words, the titanium carbide deposits onto the metal as a vapour. As a result, the metal looks black. This coating is hypoallergenic. The yellow gold option is PVD. PVD is more durable and therefore lasts longer than traditional plating. However, the plating may irritate metal allergies. The charm is a metal alloy, which is ideal for casting and makes them perfect for jewelry with fine details. Many people have sensitivities to these alloys and may react. Metal Alloys with a PVD coating can help negate this reaction, but they may still irritate those with the strongest sensitivities. To avoid turning green, metal alloy jewelry is recommended to be cleaned often and not worn in moist/sweaty places. Show us where you wear yours with #BodyModsFamous on Instagram. We LOVE seeing our jewelry out in the real world. Finally, don't forget to follow us on and for updates on new jewelry, product info, sales, and more.