Lexmark 50F0X0G Unison Toner delivers consistent, shake-free image quality and long-life reliability for MS410/MS510/MS610 printers. This high-yield black cartridge yields up to 10,000 pages for a lower cost per page. Genuine Lexmark supplies are engineered to work together. Includes Lexmark Cartridge Collection. Return Program cartridges are licensed for single use and must be returned to Lexmark.