These printers use the CLI-251XLGY cartridge:
Click On a Printer to View it's Cartridges
          Canon Pixma IP-7250
          Canon Pixma IP-8720
          Canon Pixma IP-8750
          Canon Pixma MG-5450
          Canon Pixma MG-5550
          Canon Pixma MG-5620
          Canon Pixma MG-6320
          Canon Pixma MG-6350
          Canon Pixma MG-6450
          Canon Pixma MG-7120
          Canon Pixma MG-7150
          Canon Pixma MG-7520
          Canon Pixma MG-7550
          Canon Pixma MG-7750