MICR toner cartridge is designed for use with HP LaserJet P4014n, P4014dn, P4015n, P4015dn, P4015tn, P4015x, P4515n, P4515tn & P4515x. 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.