By installing a genuine OKI Cyan Toner Cartridge you can enjoy fantastic quality colour prints and reliable operation from your OKI C610 printer. When the current toner cartridge in your C610 is running out, you'll see a Toner Low message or notice faded text on printouts. Order a replacement quickly and replace the old one when you see Toner Empty displayed. This standard yield toner cartridge is packed with enough cyan toner to print 6000 pages.