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