Koh-I-Noor Rapidograph Technical Pen – #4 (1.20 mm) – Read Description B4 Buying
These pens work best on a smooth surface as textured surfaces may cause finer nibs to skip. Koh-I-Noor technical pens have been used by generations of artists for precise line work. (INKS: Koh-I-Noor Inks are designed for use in these technical pens. ).