Schmidt® Safety Ceramic Roller 5888 F Refill (Fine Point)
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The above refill fit the following pens: ACME Rollerball, Aurora, Avantime Rollerball & Ballpoint, Bexley, Bossert & Erhard, Caran d'Ache, Casanova Rollerball, Colebri, Conklin, Conway Stewart, Dani Trio Rollerball pens, Delta, Diplomat, Faber-Castell, Itoya, Jean-Pierre Lepine, Jean Pierre Lepine, Magnum Ice Rollerball, Marlin, Montegrappa, Monte Verde, O'netts Rollerball pens, Pentel, Retro 1951, Recife, Rotring rollerball, Samba, Stipula, Visconti, Waterford, Waterman, Winston, Yafa, Yard-O-Led. Also Berlin, Pelikan Pharo & Technixx series, Cristian Sorrel & Perraz Quantum by Stride, Monte Verde pens that take "ceramic refills", Rotring 600, Rotring Core, Waterman Hemisphere, Phileas, Lauret & Claria', Jubilee as well as Premier, Esprit, Marseilles, Durango, Eldorado & Lexon Rollerball pens.
* If you own a pen that is Made in China with a refill that looks similar to this standard Schmidt 5888 refill, you should try the Esse IR-505L or Bright Moon Roller refills, as those have been the only two I have found work in that case!