– JETSTREAMEquipped 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.- A multifunctional pen that uses a highly convenient knock type.- Consists of Ballpoint pen Black / Red (diameter 0.5mm) + Mechanical pencil (for lead 0.5mm)- Replacement for ballpoint core (type SXR-200-05 ) and mechanical pencil lead are not included.