IKONG 950 Ink Compatible Ink Cartridge Replacement for HP 950XL 951XL Ink Works with HP Officejet Pro 8600 8610 8100 8620 8630 8640 8660 8615 8625 251DW 271DW 276DW Contents: IKONG 950XL 951XL Compatible Ink Cartridge Replacement ( 5 Black,2 Cyan,2 Magenta,2 Yellow) Total 11-pack Page Yield(approx): 2,300 (Black) and 1,500 (Color) Printer Compatibility:HP OfficeJet Pro 8600, 8610, 8100,8620, 8630, 8640, 8615, 8625, 251DW,271DW and 276DW 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. Upgrade Firmware Support: Click "IKONG" below the price,then enter "Ask a question" on the Top right to the next page to contact us,with any "damaged cartridge "emails replied in less than 24 hours 7/7.