Bosumon 950 951 Compatible Ink Cartridge For HP 950XL 951XL Replacement for HP Officejet PRO 8610 8600 8620 8630 8640 8660 8615 8625 251dw 271dw (Pack of 4) Page Yield: Black 2,300 pages, C/M/Y 1,500 pages, 5% coverage Printer can recognised them straight away Ink works as well as the original HP inks that were in the printer when purchased Worked perfectly, quality as good as the original one ISO9001 and ISO14001 certificated.