Description: OEM (original) black printer ribbon cartridges for the Okidata Microline 520 are available to you right on our site. Buy Genuine Ribbon cartridges for Okidata Microline 520 and enjoy clear, accurate printouts from your Microline 520. Compatible with Microline 520/521 - Product: OKI 520 Ribbon Cartridge - Type: Ribbon - Printing Colour: Mono Black - Compatability: Microline 520/521