For continued, high quality printing with your Kyocera FS-1035 or FS-1135 laser printer, install a genuine Kyocera Black Laser Toner Kit (TK-1140). You'll see a Toner is Running Out message on your printer's display when it's time to order a fresh toner cartridge. When you see Add Toner, simply replace the old cartridge with the new one to continue printing. This standard yield cartridge is packed with enough black toner to print 7,200 pages.