Oil-less formulation makes the genuine Oki 43640302 black toner cartridge a reliable product for cost-effective printing of professional-quality documents. The black Oki 43640302 toner is a separate cartridge from the drum unit for faster and cheaper maintenance, but it is a long-life product that is suitable for the printing needs of a small office. The Oki 43640302 black toner delivers the sharpest text and detailed graphics in monochrome, even on plain office paper. The Oki 43640302 toner cartridge is compatible with a good selection of speciality media and can print approximately 2,000 pages in black and white.