This HP 78A (CE278A) Black Toner Cartridge is perfect for your printing needs. It is compatible with various HP LaserJet Pro models such as P1566, P1606, and M1536DNF. The cartridge is designed for laser print technology and produces sharp and clear black prints. The item dimensions are 9.1in. in height, 14.8in. in length, and 5.1in. in width. It is ideal for printing documents, presentations, and other professional materials. This toner cartridge is a great addition to your printer and will provide you with consistent and reliable results.