Tombow Monograph Light Ballpoint Pen Refills - Black / Blue / Red Ink - 0.38 mm / 0.5 mm

These oil-based ballpoint pen refills are compatible with Tombow Monograph Light Ballpoint Pen series.

The synergistic effect of the high-precision needle tip and ultra-low-viscosity oil-based ink achieves an amazingly smooth writing experience.

How to replace the lead:

1. Remove the front barrel and spring, and take out the used core.
2. Insert a new center core into the body shaft.
3. Insert the spring into the tip of the new core.
4. Install the tip.