E-MALL Dell Compatible C2660/C2665dnf Set of 4 High Yield Toner Cartridges: 1 593BBBU Black, 1 593BBBT Cyan, 1 593BBBS Magenta, & 1 593BBBR Yellow for use in Dell C2660dn and C2665dnf Printers Premium Compatible Toner Cartridges w/ Lifetime Warranty Page Yield: Black-6,000 & Color-4,000 per cartridge | Shelf Life: 24-36 months per cartridge For use in the following printers: Dell Color Laser C2660dn, Dell Color Laser C2665dnf This replacement toner cartridge is built to ISO9001 and ISO14001 Factory Standards The use of compatible cartridges and supplies does not void your printer's warranty