Do it Wiser Compatible Toner for Konica Minolta Bizhub C350 C351 C450 (4053-401 4053-501 4053-601 4053-701) - 4 Pack Estimated page yield: Black and Colors 11,500 pages (depends on printer and usage) Compatible with part numbers: 4053-401 4053-501 4053-601 4053-701 | TN310 Suitable for printer models: Konica Minolta Bizhub C350 C351 C450 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