This HP 25X High Yield Toner Cartridge is a reliable choice for your printing needs. It is compatible with HP LaserJet Enterprise M806 and M830 models, and is designed to provide high-quality black prints with a yield of up to 25,000 pages. The cartridge is an original HP product, ensuring that you get the best results and longevity. The unit type is a standalone unit, and it is sold as a single unit. The cartridge is perfect for those who need to print large volumes, and the laser print technology ensures that the prints are sharp and clear. The color is black, and the model number is HP 25X. This cartridge is a great addition to any printer setup, and is sure to provide consistent and reliable results.