Installing a genuine Samsung Magenta Toner Cartridge ensures the best possible quality and reliability from your Samsung CLP-310 or CLP-315 laser printer. When the magenta colour indicator flashes red, the corresponding toner is running low. Order a replacement and install it when you see a solid red light, indicating that the magenta cartridge is low. This standard yield toner cartridge is packed with enough toner to print 1,000 pages.