The BlackToner cartridge 50F0H00 is a compatible product specifically designed for Lexmark printers MX317, MX417, MX517, and MX610. It offers high-quality black printing using laser print technology. This unit quantity is 1, making it a convenient and reliable choice for those looking to replenish their printer ink supply. Additionally, this compatible cartridge ensures seamless integration with the specified Lexmark models for consistent and efficient printing performance.