Supplied fully assembled. This high quality ball closure ring (BCR) is offered a choice of 316L surgical stainless steel or grade 23 titanium and features a 316L cast steel clip-in brain decoration. The top of the clip-in piece features two small indentations which enable it to be held in place by way of a tension grip. To remove the decoration, pull the two ends of the ring apart and the decoration will drop out. To replace the decoration, pull the two ends of the ring apart, position the two dents on either side of the decoration onto the ring ends and then release your hold on the ring. The two ends of the ring will squeeze together to hold the decoration in place. The ball closure ring (also known as a captive bead ring) has a gauge of 1.6mm gauge and is offered in a choice of internal diameter sizes between 12mm and 18mm.