The Lomentics 128 Black Toner Cartridge 2-Pack CRG128 Toner is designed for use with printers such as the MF4450, MF4700, and MF4 series. These compatible cartridges have a page yield of 2600 pages each and come in convenient package dimensions of 12.8x7.52x4.29 inches. The cartridges are in black ink color and weigh 2.84 pounds, making them a reliable and efficient choice for printing needs. The USB hardware interface ensures easy installation and use, while the print-only function allows for focused printing without additional scanner capabilities.