V4INK 1 Pack Black Toner Cartridges New Replacement for use with Dell 1250c Dell 1350cnw Dell 1355cn 1355cnw c1760nw c1765nf c1765nfw Printer This is an compatible replacement alternative for OEM Dell 1250 Toner Cartridge, including 1 Pack Dell 3K9XM / 331-0778 Black Toner Cartridge Print more and cost less, V4INK black toner cartridge yeild is 2,000 pages/toner,and color is 1,400 pages per toner cartridge based on 5% coverage (letter/A4); OEM black toner cartridge yield is 2,000 pages, but its $30.00 After-sales Quality Assurance, we definitely take responsibility for our product. We provide 2-year money back guarantee; any quality issue within 2 years, please contact us to have replacement or refund; provide 24/7 customer service. Our toner cartridges are produced by certificated facotries which bare ISO9001 for quality assurance and ISO 14001 for environmental assurance. Suitable for Dell Color Laser 1250c Dell 1350cnw Dell 1355cn 1355cnw c1760nw c1765nf c1765nfw Printer