Sotek Replacement 970XL 971XL Ink Cartridges High Yield use for Officejet Pro X476dw X576dw XX476dn 451dn X451dw X551dw printers work with all new firmwares and old firmwares Advantages: With newest chip. Ensured to be compatible with all firmwares in market with 2 years warranty. Vivid color, sharp and crisp printing. Saving you up to 75% costs. Package Includes: 2 x 970 xl Black CN625AM , 1 x 971 xl Cyan CN626AM, 1 x 971 xl Magenta CN627AM , 1 x 971XL Yellow CN628AM (NON-OEM) ISO9001 Certified,2-Years Warranty and 100% satisfaction guarantee Work for: officejet pro X451dn X451dw X476dw X476dn X551dw X576dw Printer.