3 color ballpoint pen : black, red, blueThe world’s smallest ballpoint pen with a diameter of 0.28 mm, “JETSTREAM EDGE”- JETSTREAM ballpoint penEquipped with the world’s first epoch-making newly developed ink that realizes “addictive, smooth writing taste”,”JETSTREAM” achieves a smooth writing taste with low writing resistance regardless of the writing speed compared to existing oil-based ballpoint pens.