– JETSTREAM Equipped 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. – It is a single-color ballpoint pen that pays attention to details such as a soft knocking sound while maintaining a high-class shaft design and smooth writing. – Ballpoint pen Black (diameter 0.7mm) – Replacement for ballpoint core (type SXR-7) is not included.