One side of this threadless titanium nipple bar is fixed, and the other side is threadless, which means you could mix and match front-facing tops if inclined It comes in four different colored bezel-set gems - clear cubic zirconia, purple opal, blue opal, and white opal. The pin on the threadless side stays in place due to pressure from a slight bend in the pin. Manufactured from high polish implant grade titanium and sold as single pieces.