Waterman has created an exclusive line of ink cartridges and bottled inks that ensure optimum functionality in your Waterman Pen. Waterman ink comes in a variety of colors to allow you to express yourself in your own signature style. Waterman Mysterious Blue Ink Cartridge is the ideal color to choose when you're contemplating between blue or black ink. The perfect blend of the two most popular Waterman ink colors. Cartridge will fit any Waterman Fountain Pen except Ice Et La fountain pens. This item is Brand New from Waterman and includes 8 Ink Cartridges.