MICR toner cartridge is designed for use with HP LaserJet Enterprise 600 M601N, M601DN, M602DN, M602N, M602X, M603DN, M603N, M603XH; LaserJet Enterprise M4555 MFP, M4555F MFP, M4555FSKM MFP and M4555H MFP. Toner contains magnetic image character-recognition ink for security purposes in printing checks. Replacement cartridge yields approximately 10,000 pages. Elite Image is ISO certified. More from the Manufacturer