This individually-sold stainless steel captive spring bead ring offers a spring design for easy insertion and comes in eight different gauges (from 8G (3mm) to 00G (10mm)) and three different inner diameters (1/2" (12mm), 9/16" (14mm), 5/8" (16mm)). Made of high-quality 316L stainless steel, this accessory is perfect for any piercing.