Inkcool Remanufactured for HP 940 BK/Y c4900a & HP 940 M/C c4901a printhead printer head for HP Officejet Pro 8000 8500w Printers 2PK 1.Packing list: BK/Y printhead-1pcs, M/C printhead-1pcs 2.Shelf Life:12-18 months 3.Fast shipment 4.ISO9001Certified 5.Compatible for HP Officejet Pro 8000 8500w Printers