For crisp output and reliable operation from your Samsung SCX-5635FN or SCX-5835 laser printer, choose a genuine Samsung Black Toner Cartridge. You'll see a Toner is Low. Order New One message on your printer's display screen when the current toner cartridge is running low. Order a replacement cartridge and install it as soon as possible to continue printing. This standard yield toner cartridge is packed with enough toner to print 4,000 pages.