This Gold PVD Opalite Flat Disk Captive Ring is made of a durable 316L stainless steel, coated with a smooth gold PVD finish. The centerpiece is a synthetic white opal, available in both 16G and 14G sizes, with a 3mm and 4mm diameter respectively. Perfect for healed septum and cartilage piercings, this captive ring is the perfect accessory for everyday wear.