These printers use the 5646C001 cartridge:
Click On a Printer to View it's Cartridges
          Canon i Sensys MF-272 DW
          Canon i Sensys MF-275 DW
          Canon i SENSYS LBP 122 DW
          Canon imageCLASS MF-272 DW
          Canon imageCLASS MF-275 DW
          Canon ImageClass LBP 122 DW