THEY ARE PRODUCED BY A DIFFERENT SUPPLIER THAN THE 'NON ECO' SERIES. 12 MONTH WARRANTY! BrotherDCP 8110DN, 8150DN, HL 5440D, 5450DN, 5470DW, 6180DWT, 6180DW, MFC 8510DN, 8520DN, 8950DWT, 8950DWT. DR-3300 COMPATIBLE ECO BROTHER SERIES DRUM FOR HL5440D HL5450DN HL5470DW HL6180DWT DR3300 CAPACITY 30,000 PAGES.
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