This is not an OEM original brand. These are Premium Remanufactured Re-Used Cartridges. MICR toner cartridge is designed for use with the Hewlett-Packard LaserJet 4000, 4050 Series MICR. Manufactured with new after-market components, cartridge contains ultra-fine particle toner and a sealing process that ensures a leakproof cartridge. Cartridge yields approximately 10,000 pages. Elite Image is ISO certified.