These printers use the GPR-6 cartridge:

Canon ImageRunner 2200

Canon ImageRunner 2200 I

Canon ImageRunner 2220

Canon ImageRunner 2220 I

Canon ImageRunner 2220 N

Canon ImageRunner 2300

Canon ImageRunner 2800

Canon ImageRunner 3300

Canon ImageRunner 3300 I

Canon ImageRunner 3310 F

Canon ImageRunner 3320

Canon ImageRunner 3320 G

Canon ImageRunner 3320 I

Canon ImageRunner 3320 N

OCE OP 22

OCE OP 33