Oki Okidata ML690 and ML691 Printhead [44158904 ] OKI offers the Replacement Printhead for the Microline dot matrix printers. This user-replaceable printhead has an average lifetime of 200 million characters in utility mode at normal 25% duty and 35% page density. Works on Oki Okidata ML690 printer and Oki Okidata ML691 printers.
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