Do it Wiser Compatible Toner Cartridge Replacement for Dell C2660dn C2665dnf Extra High Yield 593-BBBU Black, 593-BBBT Cyan, 593-BBBS Magenta, 593-BBBR Yellow (4-Pack) &#9989; Estimated page yield: Black 6,000 pages and colors 4,000 pages (depends on printer and usage) &#9989; Compatible with part numbers: 593-BBBU for Black, 593-BBBT for Cyan, 593-BBBS for Magenta, 593-BBBR for Yellow &#9989; Compatible with printer models: Dell C2660, Dell C2660dn, Dell C2665dnf &#9989; Our Do it Wiser Smart toner cartridges are covered by a 1 year warranty against defects &#9989; Cartridges certified to work | ISO 9001 quality assurance | ISO 14001 environmental management | RoHS Lead Free Dell C2660 Dell C2660dn Dell C2665dnf Dell 593-BBBU for Black Dell 593-BBBT for Cyan Dell 593-BBBS for Magenta Dell 593-BBBR for Yellow