Waterman - Refill Cartridges for Fountain Pens, Blue/Black Ink, 8/Pack - Sold As 1 Pack Smooth flowing ink adds to the sophisticated writing experience. Easy to replace refill offers mess-free cartridge changing. Waterman demands exacting manufacturing standards so you can expect consistent, flawless ink delivery. Pen Refill Type: Fountain; Special Ink Type: N/A; Refill For Series: Cartridge Refills For Waterman Fountain Pen; Tip Type: N/A. Smooth flowing ink. Easy to replace; mess-free. Exacting manufacturing standards; consistent, flawless ink delivery.