EPS Replacement Toner Set for Dell C2660DN C2665DNF, 1 x 593-BBBU Black, 1 x 593-BBBT Cyan, 1 x 593-BBBS Magenta, and 1 x 593-BBBR Yellow Premium Compatible Toner Cartridges w/ Lifetime Warranty. Print Yield : Black 6000 pages, Color 4000 pages (based on average 5% coverage ) Compatibility : Color Laser Dell C2660dn/ C2665dnf This replacement toner cartridge is built to ISO9001 and ISO14001 Factory Standards.