THEY ARE PRODUCED BY A DIFFERENT SUPPLIER THAN THE "NON ECO" SERIES. 12 MONTH WARRANTY!Oki B 411DN, 411D, 431DN, 431D, MB461DN, MB471DN, MB471DNW, MB491DN Compatible Printers. BLACK ECO SERIES COMPATIBLE B411 TONER FOR OKI B411dn,431dn,MB461,MB471,MB491 44574703 3,000 PAGES.
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