![CIS-CISS-For-HP-Officejet-Pro-8610-8620-8630-8600 Printers that Use the HP 950-951 Cartridges CIS-CISS-For-HP-Officejet-Pro-8610-8620-8630-8600 Printers that Use the HP 950-951 Cartridges](https://www.inkproducts.com/images/P/HP%208720%20Ink%20Ssyem.jpg)
HP has a new lockout firmware to stop any CIS from working. We have found that using our refillable cartridges or refilling the HP cartridges works the best.
- Our ink gives you the superior image quality you need and provides light resistance and exceptional quality and durability.
- Redesigned ink system cartridges with our exclusive air pressure chamber to stop insufficient air pressure and allow cleaning of the print head.
- 4 - Prime Tools should you run the ink tank out of ink.
- The system is pre-filled with of our Ultra Pro® Pigment ink. (OEM Quality)