This genuine HP LaserJet 61X (C8061X) High Volume Black Toner is a top-quality product that is compatible with HP LJ 4100, 4100mfp, and 4101 mfp printers. The toner cartridge is designed to produce sharp and clear black prints with excellent yield. The cartridge comes in a sealed bag, ensuring that the toner stays fresh and free from dust and other contaminants. The HP 61X toner cartridge is ideal for printing documents, presentations, and other professional materials with ease. The cartridge is made with laser print technology, which provides high-quality and consistent results with every print. This product is perfect for those who want to achieve professional-quality prints at home or in the office.