High-precision spring-loaded ballpoint nib, excellent sealing and durability
The high-precision 0.5mm ballpoint nib was carefully made by Swiss Mikron machines. Its built-in spring presses on the ball and the ball seat when the pen is placed horizontally to prevent ink leakage, and the ink does not dry out easily, even when not used for a long time. The tungsten carbide ballpoint delivers fantastic durability.