Lexmark 60F1X00 Black Extra High-Yield Return Program Toner Cartridge Is For High-Quality Printing And Device Reliability. Yields Up To 20,000 Pages. Provides Life-long Reliability. Compatible With Mx510, Mx510de, Mx510dte, Mx511, Mx511de, Mx511dhe, Mx511dte, Mx610, Mx610de, Mx611, Mx611de, Mx611dhe, Mx611dte.