Titanium is and will be one of the best materials to use in piercing jewelry. It's nickel-free and, therefore, can be used in new piercings, as well as by people who suffer from nickel allergy. 

This barbell is internally threaded, which makes the insertion less risky. A barbell with an external thread can scrape the tissue around and inside the piercing. However, as the thread in this barbell is inside the bar, the risk is minimal. 

The bar can be chosen from a few different lengths and several colors. The most important thing is to ensure that the size matches your piercing. You can use this barbell in all the piercings, as long as the dimensions and shape are suitable for it.