This Stainless Steel Captive Ring with Hematite Bead is made of 316L stainless steel and plated with a hematite ball. It is available in 18G, 16G, 14G, 12G, 10G and has several inner diameters (5/16", 3/8", 1/2", 9/16", 5/8" and 3/4"). Great for septum, daith, cartilage, and tragus piercings.