This is a compatible Toshiba T6000 black laser toner cartridge guaranteed to perform with your Toshiba E-Studio 520/600/720/850 laser printers. It replaces the original Toshiba T6000 laser toner cartridge. The compatible replacement T6000 laser toner cartridges and supplies (also known as generic) are specially engineered to meet the highest standards of quality, reliability and exceptional yields that meet or exceed OEM (Original Equipment Manufacturer) standards for the T6000 and offer high-quality printing results. Manufactured 100% brand new, they are an economical alternative to expensive OEM T6000 Toshiba laser toner cartridges and supplies, and offer big savings over brand-name T6000 laser toner cartridges and supplies. The use of compatible replacement laser toner cartridges and supplies does not void your printers warranty.We offer a Two Year 100% Quality Satisfaction Guarantee on our compatible T6000 laser toner cartridges and supplies. LD © Cartridges are manufactured in an internationally certified ISO 9002 factory. LD © cartridges come with a 100% Two Year money back guarantee and technical support. For use in the following printers: Toshiba E-Studio 850, E-Studio 600, E-Studio 520, E-Studio 720