Internally threadedtop piece that has a moon phase design made up of two crescent moon shapes and a 2mm bezel setsynthetic white opal gem. Accented with a dangling 1.5mm clear cz gem. Size is 16G with M0.9 threading. Made fromASTM F-136 titanium. Top size: 9mm x 7.5mm. Sold individually (1pc, top only).