Oki Microline 5721/5791 Fabric Ribbon Black 44173406Install a genuine OKI ink ribbon in your ML5721 or ML5791 Microline dot matrix printer for top quality results. This ribbon is designed for an easy changeover and quick installation. The high quality nylon construction gives minimal wear, offering a lifespan of up to 13 million characters per ribbon. It uses premium quality inks with a metered output for consistent quality, precisely controlled for even coverage for each and every character. Colour: