These printers use the 842126 cartridge:
Click On a Printer to View it's Cartridges
          Ricoh Aficio MP-4054 SP
          Ricoh Aficio MP-5054 SP
          Ricoh Aficio MP-6054 SP
          Ricoh MP 4054 SP
          Ricoh MP 4055
          Ricoh MP 5054 SP
          Ricoh MP 5055
          Ricoh MP 6054 SP
          Ricoh MP 6055
          Lanier MP 4054 SP
          Lanier MP 5054 SP
          Lanier MP 6054 SP
          Savin MP 4054 SP
          Savin MP 5054 SP
          Savin MP 6054 SP