The Canon Genuine 128 Black Toner Cartridge is a high-quality printer accessory designed specifically for Canon printers such as MF4450, MF4770n, and MF4570. This compatible toner cartridge ensures crisp and professional black prints using laser print technology. With a unit quantity of 1, this Canon 128 model is easy to install and guarantees reliable performance for all your printing needs. Additionally, with its compact size and height of 5 inches, this toner cartridge is a convenient and efficient choice for Canon printer users.