Ink cartridge is designed for use with Hewlett-Packard Deskjet 3520E, 3521 E, 3522 E, Officejet 4620, Photosmart 5510, 5511, 5512, 5514, 5515, 6510, 6512, 6515, 7510, 7515, D5445, D5460, C6340, C6350, C6380, D7560, B8550, E Station Plus, Premium, Premium Fax, and Premium Touchsmart Series. SmartChoice Compatible Cartridge saves energy and reduces waste to our environment, along with saving you money. Cartridge is designed and guaranteed to precisely replicate the OEM in terms of both print and image quality as well as output. This is governed by specific ISO standards. All finished products are print tested before being packed. Cartridge yields approximately 550 pages.