The Canon ImageClass D550 laser toner cartridge from ezink Products is Guaranteed to meet or exceed the print quality of the OEM (Original Equipment Manufacturer) Canon 3500B001AA (128) laser toner cartridge. Purchasing our Canon ImageClass D550 laser toner is an excellent way to save money without sacrificing quality. Our Canon ImageClass D550 laser toner cartridge has a '100% Quality & Satisfaction Guarantee'. The use of our compatible laser toner for the Canon ImageClass D550 does not void your printer's warranty. OEM laser toner cartridges are also available for your Canon ImageClass D550 printer.