The Sharp MX-C40NTB Black Standard Black Toner Cartridge is a genuine product manufactured by Sharp specifically for use in their MX-C311, C312, C400P, C401, and C402SC models. This laser print technology cartridge comes in a standard black color and has a unit quantity of 1. Made in China, it is designed to provide high-quality printing results with a manufacturer warranty of none. This product is compatible with the specified Sharp models and is a reliable choice for those looking for a quality toner cartridge for their printer needs.