This is the perfect set of nipple rings to showcase your friendship bond. Best Friend nipple ring set includes one stainless steel nipple barbell with a best charm and another one featuring a the word friend.. Specifications: 14 Gauge (1.6mm), 5/8" (16mm), 316L Surgical Grade Stainless Steel, Set of TWO Nipple Rings. Best Friend Chain Dangle Nipple Ring Set