These printers use the GPR-4 cartridge:
Click On a Printer to View it's Cartridges
          Canon ImageRunner 4600
          Canon ImageRunner 5000
          Canon ImageRunner 5000 V
          Canon ImageRunner 5000 I
          Canon ImageRunner 5020
          Canon ImageRunner 5020 I
          Canon ImageRunner 6000
          Canon ImageRunner 6020
          Canon ImageRunner 6020 I