Gel to Rollerball Adapters

Acme Studio
Aldo Domani
Aurora
Bexley
Bossert & Erhard
Cartier
Colibri
Conklin
Delta
Diplomat
E+M
Elysee
Faber Castell
Fisher Space
Foray Focus
Hauser
Inoxcrom
Itoya
Jean Pierre Lepine
Kaweco
Krone
Marlen
Moleskine
Montegrappa
Monteverde
Ohto
Omas
Online
Parker
Pelikan
Pentel
Platignum
Porsche
Regal
Retro 51
Rosetta
Rotring
Schmidt
Schneider
Sense
Smith & Wesson
Stabilo
Standard (Parker Type)
Stipula
Tombow
Visconti
Waterford
Worther
Yafa