Renewable Toner Compatible MICR Toner Cartridge Replacement for HP CE390A 90A for use in HP Laserjet 600 M601 M602 M603 M4555 MFP DEPENDABLE CHECK PRINTING. RT MICR Cartridge Replacement for HP 90A / HP CE390A SUPERIOR QUALITY. The RT Compatible HP 90A MICR Cartridge contains high quality magnetic toner that guarantees bank acceptance OEM #: HP 90A / HP CE390A | Yield 10k standard page; prints 30k checks @ 3 per page For use in HP LaserJet Enterprise Printers: 600 M601, M601n, M601dn; M602 M602n, M602dn, M602x; M603, M603n, M603dn, M603xh; M4555f, M4555h, M4555fskm MFP LIFETIME WARRANTY: we always honor warranty, even if the Amazon return window has closed