The HP LaserJet 78A Black CE278AD Toner Cartridge Lot of 2 is a genuine/original product designed specifically for HP printers. This black toner cartridge is compatible with models such as HP LaserJet Pro P1606, P1566, and M1536, ensuring high-quality printing results. One of the cartridges is new and still in the box, while the other has been opened but is unused, providing a convenient option for those in need of a reliable toner solution. Trust in the HP brand for top-notch printing supplies.