Install a genuine OKI Black Toner Cartridge (43459436) in your OKI laser printer and enjoy reliable, high quality printing. 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 standard yield toner cartridge is packed with enough black toner to print 1,500 pages.