Manufacturer:
OkidataCompatible Okidata Black Printer Ribbon, 42377801
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Okidata 42377801 Self Inking Cartridge for ML420/421 and ML490/ML491 24-pin Printers - Black
To protect your investment longer after the warranty has expired, use only genuine Oki ribbons. Why take chances. Use the Okidata 42377801 ML400 Series Self Inking Ribbon Cartridge that was designed by the same engineers who designed your printer. It's specifically manufactured to eliminate binding and wear on the ribbon drive mechanism.