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Bigger 12-pack Replacement for Okidata 42377801 Black Ribbon for Microline 420, 421, 490, 491 (ML420, ML421, ML490, ML491)

Free shipping on orders over $29.99

$19.99

$ 8 .99 $8.99

In Stock
  • Soft & Durable Ribbon - Bigger replacement for Okidata 42377801 printer ribbon adopts high-density Nylon as the base, tends to be more durable, and has no deformation after long-term printing.
  • Crisp & Uniform Printing - Superior quality ink can be efficiently adsorbed and keep good moisture retention. Fine ink particles have good fluidity and prevent clogging of the printer needle.
  • Strict & Smooth Splicing - We utilize ultrasonic welding machine to splice the ribbon, to ensure that the interface is flat, absorb the ink evenly and do not hang the needle when printing.
  • Highly Compatible - Perfectly compatible with OKI MICROLINE:420, 420 n, 421, 421 n, 490, 490 n, 491, 491 n, 720, 721, 790, 791
  • TIPS - please confirm the model of your printer and ribbons.



Product Description

Bigger ink ribbon

  • BIGGER Printing Supplies Company has developed for decades in the field of office supplies and is always to provide our customers with the best quality.
  • Each ribbon is methodically produced in our first-class facility, and each product is comprehensively tested prior to shipment.
  • We are committed to revolutionizing the Compatible Ribbon Cartridge industry with our high-grade products.
printer ribbon

PRODUCT FEATURES

Includes: Bigger replacement for Okidata 42377801 printer ribbon

Color: Black

For: Microline 420, 421, 490, 491 (ML420, ML421, ML490, ML491)

  • Brand-new ABS shell
  • High-density Nylon ribbon
  • Evenly fine ink particles
  • Ultrasonic welding technology

 printer ribbon-base

High-Quality Ribbon

The smooth and durable ribbon offers accurate colors and ultra-sharp text every time. They are what we care most and our top priority.

ribbon ink

Reliable Ink

More than giving you incredible printing, mild ink can also prevent clogging of the printer, and without concerns about smudges or smears.

Ultrasonic welding technology

Ultrasonic Welding

Ultrasonic Welding Technology provides the energy required for connecting ribbons, to make the ribbon connections be perfect. It can deliver consistent printing results, and avoid damage to your printer due to the rough interface.

printer ribbon

Work Out of Box

  • Our latest upgraded shell is injection molded from brand-new plastic and comes in precise specifications for seamless installation into your printer.
  • Each ribbon comes with an independent package that can offer better printing experience.
  • Bigger can help you get more comfortable with your daily print jobs while reducing costs.

With us, get brilliant readability and smooth characters for your projects and everyday prints.

printer ribbon installation step 1st

INSTALLATION STEPS

Step 1: Swing the front of the cartridge up off the printhead, then lift the cartridge out.

Caution!

Make sure the printer is turned OFF before open the access cover.

The printhead may be HOT!

printer ribbon installation step 1st

printer ribbon installation step 2

printer ribbon installation step 3

printer ribbon installation step 4


Customer
2025-08-28 21:57:03
These did a great job and were a lot cheaper than the name brand replacements.
Larry Brehm
2025-08-12 13:42:59
Works just like the real OEM very expensive ones! Save money and buy these
siavosh ebrahimi
2025-08-11 13:15:13
good value fast shipping
Cheryl Johnston
2025-07-22 15:58:54
These work great!
Alan Roberson
2025-07-20 18:46:30
priced extremely well
JANET J MIANO
2025-07-08 12:27:19
Great product
ScottyC
2025-05-02 18:01:48
These are the cheapest ribbons you will. Half of the ones I ordered are dry and wont lay down print at all. Absolute junk ! Save your money and buy the more expensive one for better results
Russell Gee
2025-04-24 18:46:03
Tried it. At least 3 of the 12 failed prematurely. Got little black stains consistently in some cases as the ribbon stuck and could not be wound using the thumb shaft. Its hit or miss and may hit for a big then miss. Frustrating. Down to last three. Ordered originals today
Rob Doyle
2025-03-25 12:15:44
Originally we were short changed one but the company quickly rectified it. Great service!
Specimen Trees Wholesale Nurseries Ltd.
2024-12-21 15:18:17
Work perfectly
Debbie
2024-12-12 14:19:08
These do not work in a okidata micro line printer … it said it would work for 420/421 ribbon all 12 ended up in the garbage !! Had none to send back to get credit. Do not purchase for this use
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