The 4PK Black Cyan Magenta Yellow Toner Set by greenbox is designed specifically for use with Dell C2660dn and C2665dnf printers. These high-quality toner cartridges are compatible with the specified Dell models and are manufactured in the United States. With a laser print technology, these cartridges provide crisp and clear color printing in black, cyan, magenta, and yellow. The set includes four toner cartridges, each designed to deliver consistent and reliable performance for your printing needs.