The Waterman Florida Blue 50ml pen ink cartridge ref. S0110720/S0110810 is a prestigious bottled ink designed to feed fountain pens with a converter or plunger. Its high-quality Florida blue ink formula provides a steady flow, quick drying, and a very elegant classic blue tone on paper. The 50ml glass bottle features angled facets that facilitate refilling the pen even when the ink level is low. It protects the pen's internal mechanism from clogging. An excellent choice for calligraphy, prestigious daily writing, and personal documents.