We only recommend Waterman branded refills for your Waterman rollerball pen.
All rollerball refills are water-based ink. The Waterman rollerball refills have a fine point and are available in black or blue ink.
Your Waterman rollerball pen will also fit a Waterman ballpoint refill. Those are available in black or blue oil-based, waxy ink, with a fine or medium point.
Visit our Refill University if you would like a five minute education on pen refills, ink types and points.