Install a genuine OKI Cyan High Yield Toner Cartridge (43459331) in your OKI laser printer for a reliable, high quality toner cartridge that lasts longer. When the current toner cartridge is running low, you'll notice faded text and a Toner Low message on your printer's display. Order a new cartridge and install it as soon as you see the Toner Empty message. This high capacity cartridge contains extra cyan toner for a yield of up to 2,500 pages.