IKONG 3 Black Compatible Toner Cartridge Replacement for 950XL Cartridges Works with OfficeJet Pro 8600 8610 8620 8630 8640 8615 8625 251DW 271DW Printers Contents: HP 950XL Compatible Ink Cartridge Replacement (NON-OEM) (3 Black) Page Yield(approx): 2,300 (Black) Compatible With: HP OfficeJet Pro 8600, 8610, 8620, 8630, 8640, 8615, 8625, 251DW, and 271DW printers ATTN: Any errors like"damaged cartridges",an updated firmware will fix the self-induced problem.Please download the latest firmware on HP's official website based on your printer model,and only by updating the firmware can continue to use our cartridges. "950 XL 951 XL" High-capacity ink cartridges enjoy your $AVING$ as well as the times to replace new cartridges.100% No Hassle and Money Back Guarantee.