To protect your investment longer after the warranty has expired, use only genuine Oki ribbons. Why take chances? Use the Oki 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.
Oki 42377801 Product Features
Black Ribbon, self inking cartridge for ML420/421 and ML490/ML491 24-pin printers.
Average 4 million character life.
Material: Nylon fabric, cartridge type, re-inking
Type: Black Ribbon
Compatible Printers:
Microline 420
Microline 420 (Black)
Microline 421
Microline 490
Microline 491
Oki ML400 Series Self Inking Ribbon Cartridge Specifications
Part # 42377801
Comments about Okidata ML400 Series Self Inking Ribbon Cartridge:
This is the only ribbon you should use for a 420/421. No aftermarket ribbon can match the OEM ribbon in darkness or lasting.
Primary use:
Business
10/6/2010
(1 of 1 customers found this review helpful)
5.0
Okidata brand is the only way to go.
By Girl Friday
from Flint Michigan
About Me Technically Challenged
Pros
Clean Replacement
Cons
Short Cartridge Life
Best Uses
Everyday documents
Comments about Okidata ML400 Series Self Inking Ribbon Cartridge:
Our Oki 400 series printers will not work properly with a generic ribbon. Oki brand ribbons work smoothly and are the only way to go.
Primary use:
Business
9/9/2009
(1 of 1 customers found this review helpful)
5.0
Excellent ribbons
By Joe the Boss
from Tulsa, OK
About Me Gearhead
Pros
Clean Replacement
Long Ribbon Life
Cons
Best Uses
Everyday documents
Comments about Okidata ML400 Series Self Inking Ribbon Cartridge:
We have tried the cheaper ribbons for our Okidata DM printers and found them lacking in many aspects. We will continue to purchase the Okidata ribbons for their long lasting, and excellent print characteristics. We will never go back to generic ribbons.
1.800.814.5410 
858.764.8900 Mon-Fri 6AM-4PM PT
