HP 901 Ink Cartridge Combo Pack includes a black cartridge and a tri-color cartridge that are both designed for use in Hewlett-Packard Officejet J4580, J4550, J4540, 4500 - G510g, 4500 - G510g, 4500 - G510g, 4500 Wireless - G510n, 4500 Wireless - G510n, J4680 and J4680c. Each cartridge delivers impressive color, professional-looking black text and images that resist fading for generations. The black cartridge yields approximately 200 pages. The tri-color cartridge yields approximately 360 pages.