1. First of all, Mitsubishi air signature pen can switch the thickness of handwriting according to the strength and inclination of the pen.

Secondly, you don't have to change pens back and forth.

3. Finally, Japanese Mitsubishi gel pen air signature pen 0.7mm0.5 black pen UBA- 188 students can use two kinds of signature pens to write business smoothly. The black signature pen is bold 16.85 yuan.