These printers use the GI-21Y cartridge:

Canon Pixma G-1230

Canon Pixma G-2270

Canon Pixma G-3260

Canon Pixma G-3270

Canon Pixma G-3271

Canon Pixma G-3272

Canon Pixma G-3290

Canon Pixma G-4270

Canon Pixma G-4280

Epson PIXMA G-1220

Epson PIXMA G-2260