Speedy Inks - 4PK Remanufactured Replacement for HP 60XL CC641WN CC644WN HY Ink Cartridge Set: 2 Black & 2 Color Set Includes - 2 Black 2 Color Page Yield Black - 600 Shelf Life - 12-18 MonthsPage Yield HY Color - 440 Shelf Life - 12-18 Months Cost Per Page - 2.67 centsCost Per Page - 4.09 cents The use of aftermarket replacement cartridges and supplies does not void your printer's warranty