HP 940 Magenta & Cyan Officejet Printhead C4901A B&H Photo Video
Amazon.com: LD Products Remanufactured Replacements for HP 940 Ink Cartridges / 940 XL High Yield (Black) for use in Office Jet Pro 8000, 8500 Wireless, 8500a, 8500a Plus, 8500a Premium : Office Products