Install this genuine Kyocera Black Laser Toner Kit (TK-360) in your Kyocera FS-4020D laser printer for high quality printouts and reliable operation. Your FS-4020D will display Toner Low when it's almost time to replace the toner cartridge. When it displays Replace Toner you will be unable to continue printing, so make sure you have a spare cartridge on hand for easy replacement. This standard yield cartridge is packed with enough black toner to print 20,000 pages.