OKI Black Ribbon Cartridge - 7.5 Million Characters

CAUTION: Using a non-OKI ribbon may damage the printhead and void any warranties.
-Black Ribbon self inking cartridge for ML420/421 and ML490/ML491 24-pin printers.
-Average 7.5 million character life.
-Material: Nylon fabric cartridge type re-inking
-Type: Black Ribbon
To protect your investment longer after the warranty has expired use only genuine Oki Ribbons. Why take chances? Use the ribbon that was designed by the same engineers who designed your printer; manufactured to precise tolerances to eliminate binding and wear on the ribbon drive mechanism and the highest quality ink used to reduce friction and premature printhead wear.

Compatible With:
-MICROLINE 420.
-MICROLINE 420 (Black).
-MICROLINE 420 Serial (Black).
-MICROLINE 420n.
-MICROLINE 420n (Black).
-MICROLINE 421.
-MICROLINE 421n.
-MICROLINE 490.
-MICROLINE 490n.
-MICROLINE 491.
-MICROLINE 491 Serial.
-MICROLINE 491n.
-ML420 220V Parallel (English).
-ML421 220V Parallel (English).
-ML490 220V Parallel (English).
-ML491 220V Parallel (English).