HD Toner &copy; 4-Pack Toner Cartridge Replacement for HP CE400A, CE401A, CE402A, CE403A (BLACK CYAN MAGENTA YELLOW) for HP Color LaserJet Enterprise printer M551dn, M551n, M551xh For HP LaserJet Pro 500 MFP M570dn, HP Laserjet Enterprise 500 M551dn M551n M551xh MFP575dn M575f M575c, Cartridge Number HP 507X, 507A For use in toner replacement for OEM cartridge # CE400A/X, CE401A, CE402A, CE403A 11,000 pages for the black, 6,000 pages for the colors at 5% printing coverage 100% money back guarantee. Our toner cartridges are diligently re-engineered at our manufacturing facility to ensure the same print quality as brand name cartridge. Our high print quality and low prices are backed up with a 90 days return period and great customer service. WARNING: Avoid poor imitation products from other sellers; order directly from APLUS to receive the product listed and ensure quality. APLUS is the only manufacturer and seller of this product listed. This listing is specifically created for the APLUS brand, of which we are the owner and distributor.