Overview of ION HT-Q7551A Compatible HP 51A Toner Cartridge:

Get true HP LaserJet print quality with the advanced toner formula and print cartridge technology in the HP LaserJet 59A Black Print Cartridge. Using Smart printing technology, HP delivers sharp black text and consistent, professional results for as long as the cartridge lasts. Plus Smart printing technology means less time wasted on printing problems, higher productivity, and more cost-effective printing. This cartridge has an approximate yield of 2500 standard pages.