Superb Choice Remanufactured Ink Cartridge Replacement for HP Officejet Pro 6000, 6400A Plus(pack of 2 Black) Pack of 2 Black Ink Cartridges 1 year replacement warranty,30-day refund guarantee after the purchase. Replacement for Original Model: HP 920XL(CD975AN) Compatible Printer: HP Officejet 6000, 6000 Wireless, 6500, 6500 Wireless; Office Jet Wide Format 7000; Office jet Pro 6000, 6400A Plus, 6500A e, 6500A Plus, 7500A