ZEBRA MARU-PEN (2pcs) : Maru-pen tip is good for drawing thin lines. Mainly used for drawing details such as hair, folds of clothes, or inside of pupils. T he Maru Zebra nibs makes the finest lines of any round pen (even more fine than Nikko, Deleter, and Tachikawa Round Nibs). For people who are obsessed with doing very small and extremely fine detailing. Also this pen is capable of drawing even a thick line! Probably close to that of the G-Pen's capabilities !