Fits the following rollerball pens:
ACME® Aldo Domani® Aurora® Bexley® Bossert & Erhard® Colibri® Delta® Diplomat®Elysee® Faber-Castell® Inoxcrom® Jean Pierre Lepine® Krone® Marlen® Montegrappa® Monteverde® Nettuno® Omas® Pelikan® Retro 51® Rotring® Sensa®Stipula® Visconti® Yafa®