The 4001 ink guarantees a smooth ink flow, expressive writing, and vibrant colors. The royal blue ink is erasable and washable. This product is one of Pelikan's core products. Its finely tuned formula has proven itself over many decades and remains an essential product for every Pelikan fan. The GTP/5 large-capacity ink cartridge is for all Pelikan cartridge fountain pens (and many others). The 4001 ink case contains five large-capacity ink cartridges.
