The Canon CLI-521 Yellow Remanufactured Ink Cartridge by JetTec - CL52Y is a JetTec branded Remanufactured printer ink cartridge for Canon printers. They provide OEM style quality printing but at a fraction of the cost of original Canon cartridges. Jet Tec Remanufactured inkjet cartridges are made in the United Kingdom and are compatible with the latest and most popular types of printers. The quality of JetTec products is second to none. JetTec is also an ISO 9001 registered company and ISO 9001 procedures are applied throughout the entire manufacturing process. JetTec ink jet printer cartridges can act as high quality replacements for Canon coded genuine products.