The NEW Genuine OKI OKIDATA 52107001 Microline 520/521 Black Cartridge Ribbon is a high-quality printer accessory designed specifically for OKI Data printers. This original black ribbon cartridge is compatible with the Microline 520/521 models and is manufactured in the United Kingdom. With a unit quantity of 1, this genuine OKI product ensures optimal performance and reliability for all your printing needs. Upgrade your printing experience with this authentic and reliable black cartridge ribbon from OKI OKIDATA.