Only a genuine Kyocera Black Laser Toner Kit (TK-450) can guarantee top quality performance and reliability from your Kyocera FS-6970DN laser printer. When your FS-6970DN displays a Toner Low warning on the display, it's time to order a replacement toner kit. When you see the Replace Toner error, immediately install the new cartridge to restart printing as quickly as possible. This standard yield cartridge is packed with enough black toner to print 15,000 pages.