HP 507X (CE400X) High Yield Black Original Toner Cartridge. Compatible with the following HP printers: HP LaserJet Enterprise M551dn, M551n, M551xh, MFP M575c, MFP M575dn, MFP M575f; HP LaserJet Pro MFP M570dn, MFP M570dw. CE400X cartridge(s) average yield: 11000 pages. Colour: black. Original HP Toner Cartridges produce an average of 71% more usable pages than non-HP cartridges.