Attachment made of ASTM F136 surgical implant-grade titanium, suitable for human implant. Features three Peacock Blue opals Stones held in place using a secure prong setting. No glue is used in the manufacturing process Designed for use in body piercing. Gauge 1.2mm, 1.6mm Attachments screw in to posts. Non-Sterile QualiTi Body Jewellery reserve the right to withdraw product without prior notice due to stock depletion. Internally threaded.