Product Details 18 Gauge 5/16 CZ Gem Cartilage Chain Earring Double Piercing Get connected with this 18 gauge cartilage chain earring for double piercings. It's made with two 8mm durable 316L surgical grade stainless steel straight barbells with 3mm back ball ends. The front ball ends are 4mm and each set with a color cubic zirconia gem. The two are connected by a length of matching chain with textured embellishments for motion and style you can't help but love. You can even use them to connect multiple piercings including tragus, helix, and some conch piercings. Get your style all chained up with this cartilage piercing jewelry for two piercings. Specifications 18 Gauge (1mm), 5/16" (8mm), 316L Surgical Grade Stainless Steel Straight Barbells, 3mm-4mm Ball Ends, Cubic Zirconia