Everyday Low Pricing on a set of 4 Earth Friendly Premium Toner Cartridges including 1 Black, 1 Magenta, 1 Cyan and 1 Yellow Cartridge to replace LEXMARK 80C1SK0 for use in Lexmark CX510de, CX410de, CX410e, CX510dhe, CX510dthe, CX410dte Series printers. 2.5K Page Yield per cartridge.