TOP cartridge Compatible Toner Cartridges Replacement
http://www.amazon.co.uk/dp/B00BV9OO88?tag=dedik-21
Feature
* Compatible toner cartridges
* Black XL - 11000 pages, Cyan, Yellow and Magenta - 6000 pages based on 5% coverage
* Vacuum sealed
* For use with: HP LaserJet Enterprise 500 Colour M551dn, M551n, M551xh
Suitable for the following printers: HP LaserJet Enterprise 500 Colour M551dn, M551n, M551xh
http://www.amazon.co.uk/dp/B00BV9OO88?tag=dedik-21