– 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. – Consists of Ballpoint pen Black / Red / Blue / Green (diameter 0.7mm) + Mechanical pencil (for lead 0.5mm) – Replacement for ballpoint core (type SXR-80-07) and mechanical pencil lead are not included.