Why entrust the running of the Canon WG7540, WG7550 or any other compatible printer, to anything but a genuine MC-50 Maintenance Cartridge. Products produced by the manufacturer of your printer work flawlessly with your machine and the Canon 2723C002 Maintenance Cartridge lives up to the companies reputation.With advanced printers like your Canon business inkjet machine, you need more than ink cartridges to ensure its continued operation. You also need essential maintenance items like the original Canon MC-50 Maintenance Cartridge.If however you should ever have any problems with the 2723C002 Maintenance Cartridge, Canon offer a direct warranty, but this is very rarely needed.