With Canon Genuine Fax cartridges you can be sure you have the right supplies for your faxing needs. Using Canon Genuine products means a longer life for your Canon equipment, high yields, superior performance and the highest-quality output for your machine. FX-3 is compatible with CFX-L3500IF/L4000/L400IF and Laser Class 1060P/2050/2060/2060P/2050P.