Do it Wiser Compatible Toner for Konica Minolta C454 C454e C554 C554e - TN512K - 27,500 (Black) Estimated page yield: Black toner is 27,500 pages, at 5% coverage (depends on printer and usage) Compatible with part numbers: Konica TN512K A33K132 Compatible with printers: Konica Minolta Bizhub C454e, C454, C554e, C554 Our Do It Wiser smart toner cartridges are covered by a 1 year warranty against defects Cartridges certified to work | ISO 9001 quality assurance | ISO 14001 environmental management | RoHS Lead Free Konica Minolta Bizhub C454e Konica Minolta Bizhub C454 Konica Minolta Bizhub C554e Konica Minolta Bizhub C554 Konica TN512K A33K132 for black