This three-pack of rollerball refills has been designed by Montblanc to fit the Mozart collection and Augmented Paper writing instruments. They will not fit into the Montblanc Classique or Starwalker rollerball pens. These stunning refills are designed with a medium-sized rolling ball nib to provide you with a smooth line when writing. The specially designed Montblanc ink will help to limit the number of smudges and imperfections on your work. Medium-sized rollerball nibs are ideal for those who prefer a familiar line thickness when writing. This pack of rollerball refills comes presented in a Montblanc presentation box for safekeeping.