TRUE IMAGE Compatible for HP 90X CE390X Toner Cartridge for HP M602 M603 M4555 HP LaserJet Enterprise 600 M602dn M602n M602x M603dn M603n M603xh M4555f M4555h M4555fskm Printer Black High Page Yield: 24,000 pages @ 5% coverage Compatible Printers: HP LaserJet Enterprise M4555 MFP series; LaserJet Enterprise 600 M602, M603 series New Replaces: HP CE390X Certifications: ISO9001, ISO14001, CE, STMC Warranty: Lifetime 100% satisfaction guarantee