Schmidt 6040 Fineliner Refill for Rollerball Pens, Fiber Tip, Black Medium Fits most capped rollerball pens to turn your rollerball pen into a fineliner pen Schmidt 6040 fineliner refill in black medium point (1.0 mm). High quality German manufacturing with metal barrel and spring-loaded fiber tip for smooth writing. For more than 50 years, Schmidt has made refills for most of the high quality European pen manufacturers. For all rollerball pens using the international size refill, 4-3/8" long (110.6 mm). Made in Germany. Partial list of brands: Acme, Aurora, Bexley, Bossert & Erhard, Caran d'Ache, Colebri, Conklin, Conway Stewart, Delta, Diplomat, Faber-Castell, Itoya, Jean-Pierre Lepine, Marlin, Montegrappa, Monteverde, Pentel, Regal, Retro 51, Recife, Rosetta, Rotring, Stipula, Visconti, Waterford, Yafa, Yard-O-Lead and any other brand using the European 4.39" long (110.6 mm) rollerball refill.