OEM Compatible HP C4127X MICR Toner Cartridge for use In HP LaserJet 4000 / 4000N / 4000SE / 4000T / 4000TN / 4050 / 4050N / 4050SE / 4050T / 4050TN Replacement for Troy 4000 / 4000EX / 4050 / 4050EX MICR Cartridge with magnetic toner for check printing. Compatible with OEM #: HP 27X / C4127X High Yield: 10k Pages based on 5% coverage; prints 30k checks @ 3 per page For use in HP LaserJet Printers: 4000, 4000n, 4000t, 4000tn, 4000se, 4050, 4050n, 4050t, 4050tn, 4050se