The product is a pack of two genuine Samsung MLT-D303E black toner cartridges. These original laser toners are designed specifically for use with Samsung models SL-M4580 and SL-M4580FX printers. Each cartridge has a page output of up to 40,000 pages, ensuring long-lasting and high-quality printing performance. The black toner cartridges are single units, making them convenient and easy to install for consistent results with each print. This product is ideal for Samsung printer users looking for reliable and efficient printing supplies.