HP 507A Magenta Original LaserJet Tonerkartusche - CE403A
Specifically, it is compatible with models like the HP LaserJet Enterprise 500 M575dn, M575f, M551xh, and M551n. HP LaserJet Enterprise 500 color M551DN. HP LaserJet Enterprise 500 color M551N. HP LaserJet Enterprise 500 color M551XH.