This black toner cartridge is a high yield program that is compatible with Lexmark printers. The model number is C544X1KG and is sealed for added protection. It is designed to work with the CS510de model and is perfect for those who need a reliable toner cartridge. The cartridge is made by Lexmark, a trusted brand in the industry.This item is perfect for those who need a toner cartridge that can produce high-quality prints. It is compatible with various Lexmark printers and is designed to last for a long time. The color of the cartridge is black, which produces sharp and clear text. It is easy to install and use, making it a great choice for anyone who needs a reliable toner cartridge.