ESTON Remanufactured Ink Cartridges Replacements for HP 970XL 971XL High Yield for OfficeJet Pro X451dn, X451dw, X476dn, X476dw, X551dw X576dw (Black,Yellow,Cyan,Magenta 4-Pack) Package contains : 1 set ( 1 black 970XL CN625AM + 1 cyan 971XL CN626AM + 1 magenta 971XL CN627AM + 1 yellow 971XL CN628AM) Page yield : up to 9,200 pages for per black 970 cartridge, 6,500 pages for per color 971 cartridges base on 5% coverage. our ink cartridges is XL type, compared with the standard, they are just higher capacity ,they can work in the same printer. 970XL 971XL For use with : hp OfficeJet Pro X451dn, X451dw, X476dn, X476dw, X551dw, X576dw Remanufactured ink cartridges work as good as original one but cost less 80% than originals Pls note that the chips have been updated for the upgraded firmware, so these ink cartridges can work in upgraded or old firmware , your purchase risk is 0%