Black High Quality Chipped compatible Ink Cartridge for the Canon Pixma MP640 Printer. Ready to use, Just Plug in and Go!! (Canon Original Cartridge References CLI-521 Black, CLI-521BK)

CLI-521 standard compatible and original cartridges hold just 9ml - These Happy Printer High Capacity cartridges hold 13.5ml which is 50% Extra Ink making them Outstanding Value

The Ink Monitor will continue to work (The Ink Monitor function stops working with many compatibles)

• Beware of Chipless Cartridges
• It is not a simple task swapping the chip from the original cartridge, and getting the printer working
• The Ink Monitor Function will stop working
• The printer will continue to print when the cartridge is empty, this can damage the printer and void any warranty claims