Originally knows as South Sea Blue and then Inspired Blue and now introduced as Blue Obsession Smooth flowing ink adds the sophisticated experience of writing. Waterman Blue Obsession Ink Cartridge is the choice of generations. Like the tranquil echo of a dream, Blue Obsession brings peacefulness to the page, ready to awaken pleasant thoughts. This Ink Cartridges comes 6 in a pack and is compatible with almost all Fountain Pens.