IKONG 1Set+1BK Compatible Ink Cartridge Replacement for Ink Cartridges 940 Compatible with Officejet Pro 8500 8000 8500A Notes: Please look for the inserted direction of the cartridge when installation and be assured to plug several times if it is hard to install,as shown in Figure left. Printer Compatibility: HP Officejet 8000 - A811a, OfficeJet Pro 8000, 8000 Wireless, 8500, 8500A, 8500 - A909a, 8500A - A910a, 8500A Plus - A910g, 8500A Premium - A910n, 8500 Premier, 8500 Premier - A909n, 8500 Wireless, 8500 Wireless - A909g High Capacity:"XL" High Yield ink cartridges enjoy your $AVING$ as well as the times to replace new cartridges.(50% cheaper than the brand ) Getting brilliant readability and vivid color vibrancy for projects and everyday prints. IKONG-Smart Technology: Remaining Ink levels accurately reported for compatible printers-same as OEM capability.One-year limited warranty. What You Are Seeking for Cartridge Printer : Price, Quality and Service. Your cartridge can be delivered to your home quickly, with any questions or requirements replied in less than 24 hours 7/7. This is what we can serve you.