Titanium Internally Threaded J Curved Barbell. 16G/M0.9 threading. Manufactured from High Polish Implant Grade Titanium (Ti-6AL-4V-ELI ASTM F136).The protrusion of the J Curve barbell positions from the bottom forward, allowing your gems/ball end to be more noticeable, and prevents the piercing from resting in the rook or the gem pointing down. Enhance your piercing's look easily, since both ends come unthreaded, so you can swap your threaded end to optimize the look.