This KOKUYO rollerball pen provides a smooth, fluid writing experience with its low-viscosity ink. The 0.5mm ultra-fine tip produces precise, crisp lines, ideal for detailed writing and sketching. Its springless mechanism provides a light touch with minimal pressure. The generous ink flow creates subtle tonal variations and ensures continuous performance even at sharp angles. With an ergonomic design and balanced weight, it's perfect for everyday use. Barrel diameter: 14mm Length: 139mm Tip size: 0.5mm ultra-fine Ink: Low-viscosity blue-black Product color: Silver Springless mechanism Country of origin: Japan