Printronic 2 Pack Remanufactured HP 901XL Ink Cartridge for HP Officejet 4500 J4580 J4660 J4550 J4540 J4524 Printers (2 Black) Supported printers: HP OfficeJet 4500 HP OfficeJet G510a HP OfficeJet G510g HP OfficeJet G510n HP OfficeJet J4524 HP OfficeJet J4540 HP OfficeJet J4550 HP OfficeJet J4580 HP OfficeJet J4624 HP OfficeJet J4660 HP OfficeJet J4680 HP OfficeJet J4680c HP OfficeJet J4860 Individually factory sealed Remanufactured under strict standards One year factory warranty against product defect Brand: Printronic