"Implant grade titanium. Clicks open and shut, the segment is on a hinge so it isn't going to get lost! Available gauges 1.2mm (16g) with 8mm (5/16\") or 10mm (3/8\") internal diameter - stones are 4mm, 3mm and 2mm. Great for a number of piercings, such as septum, ear, tragus, helix, daith, forward helix etc The ring can be custom anodised to any colour on the titanium colour chart, just send me a message when ordering!"