Product Details This 4mm sparkling aurora gem flat disc ball captive ring is fashioned from 316L Stainless Steel. The 16 gauge captive ring is a universal body jewelry piercing and versatile enough for ears, lips, eyebrows, nipples and more. 10mm BCR pierced Body Jewelry. Specifications 16 Gauge (1.2mm), 3/8" (10mm), 316L Surgical Grade Stainless Steel, 4mm Flat Disc