"
Acme, Alvin, Aurora, Burberry, Caran d Ache, Cartier, Colibri (Slim), Cross, Dani-Trio-Usa, Della, Diplomat, Elysee, Faberge, Graf von Faber Castell, Itoya, Kreisler, Montegrappa, Namiki, Pelikan, Pilot, Retro 51, Rotring, Sheaffer Slim II, ST Dupont, Stipula, Visconti, Waterman, Yafa Slim, Zebra and Zepplin. Of course, almost all of these would normally use a liquid ink refill, so the G2 gives the option of economical gel ink refills that wouldn't normally be available."