Complete Set of Compatible Toner Cartridges With Dell 1250; Black 331-0778, Cyan 331-0777, Magenta 331-0780, and Yellow 331-0779 Page Yield: Around 2, 000 Pages by the Black Cartridge and 2, 000 Pages per Colour Cartridge @ 5% Standard Coverage Rate on A4 Paper Size. Manufactured with highest quality and standards by ISO, CE, & REACH manufacturer for best printing performance matching the standards of OEM. for Dell 1250C / 1350cnw / 1355cn / 1355cnw / C1760nw / C1760nfw / C1765nf PRINTOXE® Brand 100% Compatible in Retail Package Shown in Image. Shelf Life exceeds 24 Months.