This is not an OEM original brand. These are Premium Remanufactured Re-Used Cartridges. Premium, remanufactured toner cartridge is designed for use with Hewlett-Packard LaserJet 4000 Series and 4050 Series. Ultra-fine particle toner delivers crisp, black text and fine resolution. Manufactured with new aftermarket components, the sealing process ensures a leakproof cartridge. Cartridge yields approximately 6,000 pages. Elite Image is ISO certified.