316L Cartilage Earring with Black PVD Plated Spike (Sold Individually) Mirror finished Implant Grade 316L Surgical Steel Cartilage/Tragus Earring with Black PVD Plated Spike. Internally threaded spike and ball with externally threaded bar with precision threading. Lightweight and comfortable to wear. Material : 316L Stainless Steel Thickness: 16g, Length: 6mm, Spike Size : 4x8mm, 4x12mm Exceptionally High Quality Jewelry!