This is a compatible replacement laser toner cartridge to replace the Dell 331-0777 (FYFKF) high yield cyan cartridge. It is guaranteed to perform with your Dell laser printer. These compatible alternatives to the Dell 331-0777 cartridges are manufactured 100% brand new by a manufacturer that is not endorsed or associated with Dell and are guaranteed by LD to work with your Dell printer. Our compatible alternatives for OEM 331-0777 / FYFKF laser toner cartridges and supplies are manufactured to the highest performance and quality standards and will deliver optimal prints. Our compatible laser toners are an economical alternative to expensive OEM 331-0777 Dell laser toners, and offer big savings over brand-name 331-0777 / FYFKF laser toner cartridges and supplies. Replaces the following Dell part numbers: FYFKF, 331-0777, PDVTW. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty. All of our replacement toner cartridges compatible with Dell laser printers contain a toner management computer chip system that works with Dell printers*, which helps the cartridge communicate more effectively with your computer. We offer a Two Year 100% Quality Satisfaction Guarantee on our alternative compatible laser toner cartridges and supplies to replace the Dell OEM 331-0777. For use in the following Dell Color Laser printers: C1760nw, C1765nf, 1250c, 1350cnw, 1355cn, 1355cnw. We are the exclusive reseller of LD Products brand of high quality printing supplies on Newegg.