Visconti Brown Broad Point Capless Gel Refill, 1.0mm. As a Parker-style these wonderfully smooth writing refills will also fit Aldo Domani, Acme, Aurora, Bexley, Bossert & Erhard, Colibri, Conklin, Delta, Diplomat, Elysee, Faber Castell, Foray Focus, Hauser, Inoxcrom, Itoya, Jean Pierre Lepine, Krone, Marlen, Montegrappa, MonteVerde, Nettuno, Omas, Parker, Pelikan, Retro 51, Rotring, Schmidt, Schneider, Stipula, and Yafa.

Any Parker-style ballpoint pen can be converted into a capless rollerball with this kind of refill.