For models: Dell 1250c, 1350cn, 1350cnw, 1355cn, C1760nw, C1765nf
Average cartridge yield: Black: 2,000, Color: 1,400. approximate pages based on 5% coverage (actual yield depends on specific use including images printed, printer, print settings and other factors)
MFG Part Numbers: 331-0778, 331-0777, 331-0780, 331-0779