This single 10g 1.6cm stainless steel tapered oval captive bead ring is made from 316LVM ASTM 138 implant grade stainless steel. The bead is 316L stainless steel. Each tapered oval captive bead ring is hand polished to a mirror finish. The inside diameter of the ring is measured at the widest point from side to side. Sold individually; order two to receive a pair.