This is a compatible Toshiba T3520 black laser toner cartridge designed to work with your Toshiba E-Studio 350 or 450 laser printer. It replaces the original Toshiba T3520 toner cartridge and delivers a standard yield of up to 18,000 pages. Manufactured 100% brand new, this cartridge offers a cost-effective alternative to expensive OEM options while ensuring reliable and high-quality printing results. The use of compatible cartridges does not void your printer's warranty. Backed by our 100% Quality Satisfaction Guarantee.