Lexmark mx521
Machine Type: Monochrome MFP Print speed: 46 PPM Black Toner Standard Yield: Lexmark 56F1000 - 6,000 Pages Black Toner Mid-Low Yield: Lexmark 56F1H00 - 15,000 Pages Black Toner Mid-High Yield: Lexmark 56F1X00 - 20,000 Pages Black Toner High Yield: Lexmark 56F1U00 - 25,000 Pages