This standard capacity HP 903 cartridge contains 4ml of top quality magenta ink that is guaranteed to give you long lasting and impressive looking photos. Compatible with the HP Officejet Pro 6960, HP Officejet Pro 6970 All-in-One and all other printers that can be found on this page, the T6L91AE is an essential purchase.Hewlett Packard`s own T6L91AE ink cartridge has been designed as the cheapest magenta ink cartridge available for your printer, and a way to get you up an d running at the lowest initial price. However, the HP 903 magenta cartridge only has a limited page yield of 315 pages.