THEY ARE PRODUCED BY A DIFFERENT SUPPLIER THAN THE 'NON ECO' SERIES. 12 MONTH WARRANTY! COMPATIBLE PRINTERS: Oki B B401D, B401DN, MULTIFUNCTION MB441DN, MB451DN, MB451DNW. COMPATIBLE BLACK ECO SERIES TONER B401 TONER FOR OKI B401DN MB441DN MB451DN MB451DNW 44992402 2,500 PAGES.
eBay