Produce superior prints with the HP 507A Toner Cartridge in black, which is compatible with the HP LaserJet Enterprise Color M551 printer. This toner cartridge is equipped with HP ColorSphere technology, which ensures you always get professional results. You can also receive alerts when supplies are low and track toner usage, thanks to the cartridge's built-in intelligence. Features Black 5500 page yield *HPs inkjet print cartridges, ink cartridges and printheads are warranted to be free from defects in materials and workmanship during the period of the warranty. The average cartridge yields 5500 pages, making it a cost conscious choice. Get reliable results with the HP 507A LaserJet Toner Cartridge in black.