Designed to work flawlessly with the HP LaserJet Pro M501dn and all other compatible printers this HP 87X high capacity toner cartridge has been produced and designed by the very same people as your printer. As such, you can rely upon cohesion between the genuine Hewlett Packard CF287X and any compatible printer.The original HP 87X contains sufficient Hewlett Packard black toner powder for an estimated 18,000 prints, and each of these prints is guaranteed to be of astounding quality.