Blue-Green Glow in the Dark Ball Spiral Cartilage Earring 18g Steel Barbell 18 gauge 5/16-Tragus Jewelry Spiral Barbell Available in Pink or Green and in 18 gauge or 16 gauge-Choose Size from Menu Above 316L Surgical Stainless Steel Do not immerse acrylic balls in alcohol or peroxide. Clean with anti-bacterial soap and warm water.