This surface bar is made of pure titanium. It's almost entirely flat, with a thickness of 0.02 inches (0.5 mm) and a width of 1/16" (2 mm). It has two 90-degree angled edges, and the height from the base to the top of these arms, where balls are screwed into, is 1/16" (2 mm). The threads fit standard dermal balls because they have an external diameter of 1.6 mm and internal threading of 16g (1.2 mm). Keep it in mind that only microdermals fit this barbell, and not regular externally threaded balls of 16g (1.2 mm). 

To avoid piercing rejection, the bar comes with two small holes that help your body tissues to adapt. The fact that the bar is flat is also to prevent rejection. 

Choose from two different sizes for the internal thread. This surface bar doesn't contain balls; you can buy them separately if desired.