ESTON Remanufactured Replacement for 970 XL & 971 XL Toner Cartridges (2 Black, 1 Cyan,1 Magenta, 1 Yellow) for OfficeJet Pro X451DW X451DN X551DW X476DN X476DW X576DW Package contains : 5PACK ( 2 black CN625AM + 1 cyan CN626AM + 1 magenta CN627AM + 1 yellow CN628AM) 970XL 971XL Page yield : up to 9,200 pages for per black cartridge, 6,500 pages for per color 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. For use with : 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%