The 78C10K0 New Genuine Lexmark Black Toner Cartridge is designed specifically for Lexmark printers in the CS/CX 420 520 620 series. This high-quality toner cartridge ensures crisp and professional-looking black prints through laser print technology. It is a genuine Lexmark product, providing reliability and compatibility with the specified printer models. With a model number of 78C10K0, this toner cartridge is an essential component for maintaining high print quality and efficiency in your Lexmark printer system.