Introducing 0.3mm (extremely fine) that allows you to write smoothly even in fine writing!
The Acro ink has a viscosity that is 1/5 that of general oil-based ballpoint pens, making it a smooth ink that is close to water-based, and the balls rotate smoothly. Acro ink has a low viscosity, so the ink supply to the pen tip is ample. Since the ink penetrates deep into the paper fibers, the handwriting becomes even and dark.
The grip of the Acroball is made of rubber, which is a soft and non-slip material. In addition, the surface has a tire pattern consisting of non-slip irregularities.