1. Page Yield: BK 2,300 pages, C/M/Y 1,500 pages, 5% coverage
<br />2. Printer can recognised them straight away
<br />3. Ink works as well as the original HP inks that were in the printer when purchased
<br />4. Worked perfectly, no complications, quality as good as the originals
<br />5. ISO9001 and ISO14001 certificated, 1 year limited warranty.
<br />6. Compatible for HP Officejet PRO 8610 8600 8620 8630 8640 8660 8615 8625 251dw 271dw