LD Remanufactured Toner Cartridge Replacement for Dell 330-4131 P579K (Black) Page Yield: 3,500 | Shelf Life: 24-36 Months This cartridge also replaces Dell P579K and M797K The use of LD replacement ink and toner cartridges does not void your printers warranty All LD branded products are backed by a 100% satisfaction and LIFETIME guarantee For use in Dell 2230d Laser Printer