Speedy Inks Compatible Toner Cartridge Replacement for Lexmark 601X 60F1X00 Extra High Yield (Black) For use in Lexmark: MX610de, MX611de, MX611dte, MX611dhe, MX511de, MX511dhe, MX510de, MX511dte, MX611dfe Page yield: 20,000 | Color; Black Shelf Life: 24-36 Months Manufactured brand new, containing 100% new components, they are an economical alternative to expensive OEM 60F1X00 Lexmark laser toner cartridges and supplies, and offer big savings over brand-name 60F1X00 laser toner cartridges. The use of aftermarket replacement cartridges and supplies does not void your printer's warranty