Install a genuine HP for Samsung black high yield toner for long-lasting results from your laser printer. Your printer will display a flashing red error light when the toner is nearly exhausted, so make sure you order a replacement as soon as possible. The light will display a solid red light when the cartridge is exhausted, so install the replacement to continue printing without delay. This high capacity cartridge contains toner for a high yield of up to 2,500 pages.