The Lexmark High Yield Toner Cartridge is designed specifically for use in Lexmark printers MS710, MS711, MS810, MS811, and MS812. Made by Lexmark, a trusted brand in printing technology, this black toner cartridge ensures high-quality prints with crisp and clear details. Its laser print technology guarantees efficient and consistent results, making it an ideal choice for professional printing needs. With a model number of 521H, this high-yield toner cartridge provides long-lasting use and reliable performance for Lexmark printer models.