The Canon Cartuchos de Tóner Negros Genuinos 137 2-Pack, 9435B001 is a set of high-quality black toner cartridges designed specifically for use with Canon printers such as LBP151dw, MF210, MF220, MF230, and MF240. As genuine/original products from Canon, these cartridges ensure reliable and high-quality printing results. With a total yield of 4.8K pages, this 2-pack is ideal for those needing to replenish their printer's toner supply for extended printing needs. The cartridges are compatible with the designated Canon printer models and are designed to provide consistent and professional-looking black prints.