HP 90X High Yield Original LaserJet Toner – Black | CE390XPage YieldHP states the CE390X highyield black toner cartridge prints approximately 24,000 pages (based on ISO/IEC 19752 standard), with actual yield varying depending on content and usageCompatibility (Printer Models)The CE390X is designed to work with several HP Enterprise LaserJet printers. Genuine HP documentation and reputable suppliers list compatibility with:HP LaserJet Enterprise 600 series:M602 (n, dn, x)M603 (n, dn, xh) HP LaserJet Enterprise M4555 multi-function printers:M4555 MFPM4555f MFPM4555fskm MFPM4555h MFP