This genuine/original Toshiba T-8570U black toner cartridge is perfect for use with Toshiba E Studio 557, 657, 757, and 857 models. It is designed to deliver high-quality laser prints and ensure smooth printing with every use. The unit type is a standard cartridge that yields up to 36,600 pages per cartridge, making it an ideal choice for high-volume printing needs. The toner cartridge is compatible with Toshiba printers and is suitable for use in various settings such as homes, offices, and commercial spaces.