This is not an OEM original brand. These are Premium Remanufactured Re-Used Cartridges. Premium, remanufactured fax toner cartridge is designed for use with Panasonic PanaFax DF-1100, DX-1000, 2000, UF550, UF560, UF770, UF880. Cartridge with ultra-fine particle toner is made with new aftermarket components. The sealing process ensures a leakproof cartridge. Toner provides crisp, sharp text and graphics on each fax document. Cartridge yields approximately 10,000 pages. Elite Image is ISO certified.