This SuppliesMAX Inkjet is Designed to be Compatible with the HP 51604A and is Guaranteed to Match and Outlast the OEM Version ; Designed for use in the USA ; 550 Page Yield on 5% Page Coverage Model: SuppliesMAX HP 51604A Inkjet Color: Black Yield: 550 Pages Machine Compatibility: See overview tab Manufacturer Warranty: 30 DAYS Our compatible toner, inkjet cartridges, ribbons, copier and other supplies are constructed to original OEM specifications. Guaranteed Superior Quality to Meet or Exceed High Priced OEM Products. Product packing may vary but it will not affect quality and warranty.