Speedy Inks - Dell Compatible C2660 C2660Dn C2665dnf Set of 6 High Yield Toner Cartridges 593-BBBU Black 593-BBBT Cyan 593-BBBS Magenta 593-BBBR Yellow 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