- Cartridges come filled with a new generation chip, work with all new printers, and display ink levels. We offer a hassle free money back guarantee.- Compatible with HP Printers: OfficeJet Pro 8100, 8600, 8610, 8615, 8620, 8625, 8630, 8640, 8660, 251dw, 271DW, 276dw MFP- High capacity page yield: up to 2300 pages per black cartridge, 1500 per color cartridge.- All ink cartridges are backed by a 1 year returns policy, and are ISO9001 certified for cartridge quality and reliability, and ISO 14001 certified for environmental impact.- Contents: compatible cartridges for 950XL 951XL (1 Black, 1 Cyan, 1 Magenta, 1 Yellow).