Featuring HP ColorSphere technology, the HP 507A Original Black Toner Cartridge lets you print high-quality documents for your professional and creative needs. Consistent and always reliable, Original HP LaserJet toner cartridges help you waste less and are easily recyclable. This 507A Original Black Toner Cartridge is compatible with HP LaserJet Enterprise 500 colour M551n, HP LaserJet Enterprise 500 colour MFP M575dn and HP Laserjet Enterprise 500 colour MFP M575fw printers.