WATERMAN Ink Refill Cartridges for Fountain Pens, Blue, 8-Pack (S0713021). Genuine WATERMAN ink cartridges fit all WATERMAN Fountain Pens. Smooth flowing ink adds to the sophisticated experience of writing with a classic fountain pen. Like the tranquil echo of a dream, Serenity Blue brings peacefulness to the page, ready to awaken pleasant thoughts. Skilfully made in France, every WATERMAN pen echoes the genius of founder Lewis Edson WATERMAN, inventor of the first reliable fountain pen in 1883.