These printers use the GI-21C cartridge:
Click On a Printer to View it's Cartridges
          Canon Pixma G-1230
          Canon Pixma G-2270
          Canon Pixma G-3260
          Canon Pixma G-3270
          Canon Pixma G-3271
          Canon Pixma G-4270
          Epson PIXMA G-1220
          Epson PIXMA G-2260