Ink roller with an ultra-smooth tip for an exceptional writing experience, featuring a line thickness of approximately 0.6 mm. This pack includes four pens in the practical colors: black, red, blue, and green. Adheres to ISO 14145-2 standards. The Super-Flow system ensures consistent and precise ink flow from beginning to end, without smudges or the need for adjustments. The high-volume ink reservoir allows monitoring of ink levels through a clear window and is designed for complete ink depletion. The cap-off design prevents the ink from drying out, even if the pen is left uncapped for 2-3 days. The One Business pen boasts a high-quality metal clip and an ergonomic rubber grip zone for a secure and comfortable writing posture, promoting relaxed writing.