Save time on your office printing with the original HP 55A Black Toner Cartridge.You'll be able to enjoy consistent results with a HP cartridge as it is designed for your HP printer.The toner is compatible with HP LaserJet Enterprise P3015 Printer series, HP LaserJet Pro M521 Multifunction Printer series, HP LaserJet Enterprise 500 M525 Printer series and HP LaserJet flow M525 Printer.