The HP 89A Black Toner Cartridge CF289A is a genuine, original product manufactured by HP in Japan. It is specifically designed for use with LaserJet Enterprise M507 and M528 printers, ensuring high-quality printing results. This black toner cartridge comes in a single unit and is guaranteed to be compatible with HP printers, providing reliable and professional printing solutions for your business or personal needs. With the HP brand reputation for quality and performance, this toner cartridge is a trustworthy choice for producing crisp and professional black prints.