BodyJ4You 16 Gauge Surgical Steel Seamless Segment Ring Segment Ring Blue Titanium Anodized over 316L Surgical Steel Circular Barbell. 16 Gauge (1.2mm), 3/8" (10mm diameter) Can Be Rotated 360 Through Piercings. Segment Rings Perfect for Septum Piercings, Lip Piercings and Tragus Piercings. 316L Surgical Grade Stainless Steel.