316LVM surgical steel and metal alloy Austrian crystal Adhesive-set External Nipple Each piece is sold individually. The Crystal Butterfly 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. The Crystal Butterfly Nipple Barbell is 316LVM surgical steel! The post is 316LVM surgical steel. This steel is 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. The butterflies are PVD with your choice of rose or white gold. PVD is more durable and therefore lasts longer than traditional plating. However, the plating may irritate metal allergies. We use PVD over titanium because of its porosity. Being porous means the ion plating holds onto the metal better, and as a result, lasts longer. In other words, this is a double whammy of durability. If you have allergies, we recommend our 316LVM surgical steel body jewelry or our implant grade titanium. Blackline, anodized and untreated titanium are all hypoallergenic. The stones are Austrian crystals. We love Austrian crystals they don't lose their sparkle like other similar stones. If your crystals start looking dull, a quick clean will bring them back to life. 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.