These printers use the FX6 cartridge:

Canon CanoFax L-1000

Canon Fax L-1000

Canon KC 3170

Canon KC 3175

Canon L 1000

Canon L 3170

Canon L 3170 MS

Canon L 3175

Canon L 3175 MS

Canon Laser CLass 3070 MS

Canon Laser Class 3170

Canon Laser Class 3175

Canon Laser Class 3175 MS

Canon LaserClass 3170 MS