This is a genuine black toner cartridge from Lexmark, compatible with various models including C540, X543, X544, X546, X548, C546, and C543. The cartridge is designed for laser print technology and is an original product from the brand. It is perfect for those in need of a high-quality toner cartridge for their printer. The color of the cartridge is black, and it is categorized under toner cartridges, printer ink, toner & paper, printers, scanners & supplies, and computers/tablets & networking.