4 each - The OKI Microline Black Ribbon Cartridge 52104001 is a genuine/original product designed specifically for OKI Data printers. It features a dot matrix print technology for high-quality printing in black. This cartridge comes in a unit quantity of 4, providing long-lasting use for your printing needs. Additionally, it comes with a 1-year manufacturer warranty, ensuring reliability and performance. Ideal for use in OKI 380/390/391 and OKIMATE 240 printers, this ribbon cartridge is a reliable and efficient choice for all your printing requirements.