Speedy Inks Compatible Toner Cartridge Replacement for Dell C2660 C2660DN C2665dnf High-Yield (2 Black 2 Cyan 2 Magenta 2 Yellow 8-Pack) For use in: Dell C2660dn, Dell C2665dnf Page Yield: Black 6,000 & Color 4,000 per cartridge | Shelf Life: 24-36 months Our two year 100% Satisfaction Guarantee ensures that you will get excellent printouts when you buy our compatible toners All of our replacement toner cartridges compatible with Dell laser printers contain a toner management computer chip system that works with Dell printers*, which helps the cartridge communicate more effectively with your computer. The use of aftermarket replacement cartridges and supplies does not void your printer's warranty