Toner Kingdom Replacement HP 950XL 951XL Ink Cartridge Compatible With HP Officejet PRO 8600 8610 8620 8630 8640 8660 8615 8625 251dw 271dw Printer (4 Black, 2 Cyan, 2 Magenta, 2 Yellow) Recently, because the update of the printer hardware led to a lot of negative reviews, our company has upgraded chips of the our cartridges. Don't worry. If you have already purchased our product and got any problems ,please feel free to contact us: Sign in your Amazon account and Find your 'Toner Kingdom order' and click contact seller, then email us.We will try our best to solve it. Page Yield: Up to 2300 pages per black cartridge, 1500 pages per color cartridge (5% coverage) New condition and are friendly to the environment. We save you money while helping the environment. 100% Quality Satisfaction Guarantee.One-Year Warranty against defects. Free shipping on Same day or the next business day. For use with: HP Officejet Pro 8610 8620 8630 8640 8660 251dw 276dw MFP 8100-N811a 8600 e-All-in-One N911g 8600 Plus-N911n 8600 Premium N911a Printer.