This is a compatible toner cartridge set for Dell E525w and E525 Series printers. It includes one black, three cyan, three magenta, and two yellow cartridges. The cartridges have a page output of 2,000 pages for black and 1,400 pages for color. They are guaranteed to work for 12 months. This product falls under the categories of toner cartridges, printer ink, toner & paper, and printers, scanners & supplies.