The Lot of 7 OKI 42377801 Genuine Black Ribbon Cartridge is a set of high-quality printer accessories designed specifically for the OKI Microline 400 Series printers. These black ribbon cartridges are genuine OEM products from the OKI brand, ensuring compatibility and optimal performance. Each cartridge is designed to provide clear and crisp black printing, making it essential for professional documents and images. With this lot of 7 cartridges, you can keep your printer stocked and ready to produce high-quality prints for an extended period of time.