This is a compatible Toshiba T3520 black laser toner cartridge guaranteed to perform with your Toshiba E-Studio 350 or 450 laser printer. It replaces the original Toshiba T3520 laser toner cartridge. The compatible replacement T3520 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 T3520 and offer high-quality printing results. Manufactured 100% brand new, they are an economical alternative to expensive OEM T3520 Toshiba laser toner cartridges and supplies, and offer big savings over brand-name T3520 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 T3520 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 450, E-Studio 350, e-STUDIO 453, e-STUDIO 352, e-STUDIO 452, e-STUDIO 353.