For vivid and crisp output from your Samsung CLP-350N colour laser printer, choose a genuine Samsung Black Toner Cartridge (CLP-K350A/ELS). The black indicator LED on your CLP-350N's control panel will flash red when the current black cartridge is running low. Order a replacement as soon as possible and install it when the black cartridge is empty. This compact toner cartridge is easy to install and packed with enough toner to print 4000 pages.