Bezel set synthetic white opal cabochon. Set in solid ASTM-F136 implant grade titanium. Comes in 2mm, 2.5mm, 3mm, 4mm, and 6mm in a variety of threaded and threadless. Threadless style 'press fit' jewelry fits into 18g, 16g and 14g threadless posts. 2mm fits into 18g and 16 only. Threaded style jewelry fits into either 18g and 16g, or 14g and 12g depending on specified threading. This jewelry is a two part piece, the item listed is only the top portion. Does not include post/backing. Find posts in the 'Threaded and Threadless Posts' category. Guaranteed for life against any manufacturing defects. ALL SALES ARE FINAL.