These printers use the 9903 cartridge:
Savin C 2228
Savin C 2820
Savin C 3224
Savin C 3828
Infotec IS C-2028
Infotec IS C-2432
Infotec IS C-2838
Nashuatec DSC 332
Nashuatec DSC 338
Rex DSC 332
Rex DSC 338
Ricoh Aficio 2228 C
Ricoh Aficio 2232 C
Ricoh Aficio 2238 C