This is a compatible Toshiba T6000 black toner cartridge designed for use with Toshiba E-Studio 520, 600, 720, and 850 laser printers. It offers a standard yield of up to 60,000 pages, providing an economical alternative to the original Toshiba T6000 toner cartridge. Manufactured brand new, this cartridge ensures reliable performance and high-quality printing results. The use of compatible cartridges does not void your printer's warranty, and we back this product with a 100% Quality Satisfaction Guarantee.