Do it Wiser Compatible Toner for Dell C2660 C2660dn C2665dnf High Yield - (8 Pack) &#9989; Estimated page yield: K: 6000 pages CMY: 4000 pages (depends on printer and usage) &#9989; Compatible with part numbers: 593-BBBU 593-BBBT 593-BBBS 593-BBBR &#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 2 black cartridges 6,000pages 2 cyan cartridges 4,000 pages 2 magentacartridges 4,000 pages 2 yellowcartridges 4,000 pages Dell C2660 Dell C2660dn Dell C2665dnf