Body Candy 16 Gauge and 14 Gauge Blue Interchangeable BCR Set Size: 14 gauge, 16 gauge (1.6mm, 1.2 millimeters) 1/4 inches, 5/16 inch (6mm, 8 millimeters) 316L stainless steel captive ring Bcr captive rings can be used for mulitple body piercings