Lexmark 56f3000 MS321 / MS421 / MS521 / MS621 / MX321 / MX421 / MX521 / MX621 Toner Cartridge

The Lexmark 56F3000 is a standard-yield, black toner cartridge for Lexmark monochrome laser printers like the MS321, MS421, MX521, and MX622 series. It uses Lexmark's Unison™ Toner for consistent image quality and long-life reliability, and is a Return Program cartridge, meaning it is sold at a discount with the understanding that it will be returned to Lexmark for recycling or remanufacturing. The cartridge has a declared yield of approximately 6,000 pages at 5% page coverage and features a tamper-resistant chip to ensure genuine supplies and printer compatibility.