The structure of oil-based ballpoint pens

Ballpoint pens have a small rotating ball at the tip of the pen that disperses ink onto paper. In Asia, where people write kanji (Chinese characters), there is the need for pens that can produce a very fine line. On the other hand, a fine line is not required to write using the letters of alphabet. So the type of pen people want will vary greatly depending on the type of letters they write.