316LVM surgical steel and metal alloy Austrian crystal Adhesive-set N/A Through tunnels or as regular earrings Sold in pairs. The Rainbow Crystals + Chain Tunnel Hangers are high quality earrings great for daywear or a night out! These tunnel hangers have a hinged clasp so you can comfortably wear them in the ear or through a (hence the name). Just pop them in and go! The Rainbow Crystals + Chain Tunnel Hangers are made with 316LVM surgical steel. This grade of surgical steel is preferred for body jewelry because it is low vacuum-melted to remove the nickel. Nickel is one of the most common causes of metal allergies. This process cannot remove 100% of the nickel, however. As a result, there's still a small chance those with severe allergies will react. If you are worried about metal allergies, we recommend looking at our anodized, blackline or untreated titanium jewelry. Titanium is biocompatible and hypoallergenic. It's what doctors use for surgical implants because of these reasons. The crystals are Austrian crystals. These will never lose their sparkle. 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 how you styled these earrings with #BodyModsFamous on Instagram. We LOVE to see you all wearing our jewelry out there in the real world. Don't forget to follow BodyMods Canada on and for updates on new jewelry, product info, sales, and more.