PVD or 316LVM surgical steel and metal alloy Austrian crystal External 13mm 10mm Nipple, Bridge Piercings This nipple ring unscrews from one side. Insert the ring through your piercing and screw the end back on. If you need some help getting the ring through, a dab of will get it through. The Crystal Moon Nipple Ring 14g is 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. The gold and white gold options are 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. 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.