Brand Converter Cartridges
Acme Pens
Standard International
Standard International
Aurora Proprietary Proprietary
Caran D’ Ache Pens Standard International Standard International
Conklin Pens Standard International Standard International
Cross Pens Proprietary 2 types: Type I Push In-
Townsend, Aventura, Sport, Calais, and new Classic Century fountain pens. Please note that it will not fit into the original Classic Century, which is cartridge only.  Type II Screw In-
Century II, Sauvage, Peerless, C-Series, Sentiments, Affinity, Bailey, Bailey Light, Beverly, Botanica, Torero, Apogee, Verve, Wanderlust and ATX

Proprietary 2 types: Slim - Spire and original Classic Century

Standard - fits all other Cross fountain pens

David Oscarson
Standard International
Standard International
Delta
Standard International
Standard International
Diplomat Pens
Standard International
Standard International
Ducati
Standard International
Standard International
Edison Pens Standard International Standard International
Esterbrook Pens Standard International Standard International
Faber-Castell
Standard International
Standard International
Giulliano Mazzuoli
Standard International
Standard International
Graf Von Faber Castell Proprietary Proprietary
Hugo Boss
Standard International
Standard International
Kaweco Standard International Standard International
Krone Pens
Standard International
Standard International
Lamy Pens

Proprietary. 2 Types: Type 1 Z26/Z27 fits Aion, Accent, CP1, Dialog 3, Linea, Logo,  Pur,  st and Studio

Type 2 Z24/Z28 fits Safari, Al-Star, Joy, Vista, Lx, and Nexx

Proprietary - all accept the LT10 series
Marlen
Standard International
Standard International
Mercedes Benz
Standard International
Standard International
Met Museum of Arts
Standard International
Standard International
Montblanc Montblanc converter Montblanc ink cartridges.
Montegrappa Standard International Standard International
Monteverde

Standard International

Standard International
Online Pens
Standard International
Standard International
Otto Hutt
Standard International
Standard International
Parafernalia Pens
Standard International
Standard International
Parker Pens Proprietary Proprietary
Pelikan Pens
Standard International
Standard International
Pilot-Namiki Pens

Proprietary 2 Types - Type 1-CON-40-fits most of the pens

Type 2-CON-70-fits the larger pens: Custom 74, Justus 95, Chinkin, Nippon Art, Yukari, and Yukari Royale 

Proprietary
Pineider Standard International Standard International
Platinum Pens Proprietary Proprietary
Porsche Design
Standard International
Standard International
Retro 51
Standard International
Standard International
S T Dupont
Standard International -except Classique, Montparnasse, Lady and Gatsby which are Proprietary
Standard International -except Classique, Montparnasse, Lady and Gatsby which are Proprietary
Sailor Pens
Proprietary
Proprietary
Schon DSGN
NA
Standard International (Short)
Sheaffer Proprietary Proprietary
Stipula Standard International Standard International
Taccia Pens Sailor Converter Sailor Ink Cartridges
Visconti Pens Proprietary Proprietary
Waterford Pens
Standard International
Standard International
Waterman Pens Proprietary Proprietary