Product Details Hypoallergenic jewelry for sensitive skin16 Gauge 5/16 Stainless Steel Curved Eyebrow Rook Piercing Sometimes a simple problem requires a simple solution - like this 16 gauge curved barbell. It's made with an 8mm durable 316L surgical grade stainless steel curved barbell with 3mm ball ends. It can be worn in multiple piercings including rook, eyebrow, daith, and some conch piercings. Don't you love it when life's problems have simple solutions?Specifications16 Gauge (1.2mm), 5/16" (8mm), 316L Surgical Grade Stainless Steel Curved Barbell, 3mm Ball Ends