3 Pack 42377801 Ribbon, Black by OKIDATA (Catalog Category: Computer/Supplies & Data Storage / Ribbons)

These OEM ribbons work perfectly. My only complaint is that they were shipped in a padded envelope rather than in a box, so one of the boxes was crushed. The ribbon inside, however, was undamaged.

Bought this product, even though higher priced, thinking it should be much better and last longer. Apparently, not.Don't know if these ribbons are re-inked, but after some use, the ribbon starts 'peeling' causing the ribbon fibers to clump up and cause major streaking across the paper. If you clean the 'clump', eventually the ribbons wears down to the point that a tiny hole appears. Then the ribbon doesn't wind so you need to replace it. One spool lasted 49 days, the next one 21 days. Guess I should just go back to buying generic.