These printers use the GI-21M 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