What is a comic nib: Delitor has 4 types of nibs that can be used to attach ink to the pen axis. The round pen has a thin line orientation, and is mainly used to depict small parts, such as wrinkles of hair, clothing, and in the eyes. Some people draw to the main line. The G Pen is a highly elastic and versatile nib. Used to draw effects such as main lines, focus lines, etc. The sagi pen is hard and easy to draw on any line. Also known as the Cabrapen or Tama Pen.

(From Amazon.co.jp)