ESTON Remanufactured Ink Cartridge Replacement for HP 901XL (Black,Cyan,Magenta,Yellow, 2-Pack) Package Includes : 1 Black + 1 Color (High quality remanufactured ink cartridges,Easy to install ) Page Yield: 700 pages per black cartridge ; 500 pages per color cartridge( at 5% coverage) Compatible with Printers: HP Officejet 4500 J4500 J4524 J4540 J4550 J4580 J4624 J4640 J4660 J4680 J4680C Printer More feature : 1.High color saturation,high fidelity. 2.Ultrafiltration,no clogging caused. 3.Weak acid or alkalescent formula,no corrosion problems. 4.No bleeding,no smear,high print quality. 5.Quick dry formula,satisfaction at high speed printing. All product have ISO9001 and MSDS certificate approved, all products are backed by 1 years full refund or free exchange guarantee for any damaged