Protect your investment. Always use genuine OKI accessories and/or supplies for superior output. This high quality black ribbon is designed for use with Microline 380, 390, 390 Plus, Turbo, 391, Plus and Turbo printers. - Printer Ribbon - For use with OKI Microline 3390, 3391, 380, 385, 390, 390 Elite, 391 - 2 Million Characters - Black