Owing to their liquid based ink, rollerball refills are much smoother than a ballpoint (but can’t be used interchangeably). Those from the big brands such as Parker, Cross, Lamy and Waterman are only compatible with their own pens. If your rollerball is from a niche brand such as Otto Hut or Coles Deluxe, choose our Monteverde standard rollerball refill which fits most pens and is available in eight colours. Cross rollerball refills are particularly smooth due to their gel ink. Try our interactive refill finder.