Tombow MONO Graph Ballpoint Pen REFILL 0.5 - Black

These official replacement refills are designed specifically for the Tombow MONO graph series, ensuring your pens continue to perform with the smooth, consistent flow you expect. Available in multiple tip sizes and classic ink colors, these refills allow you to extend the life of your favorite writing instruments while maintaining a clean and professional finish. For the best writing experience and to protect the internal mechanisms of your pen, always use genuine Tombow Pencil refills.