The product is a brand new genuine HP 21 black ink cartridge in a sealed box with an expiration date of 01/2010. It is compatible with Hewlett Packard and HP printers, using pigment, inkjet, and thermal print technology. The cartridge is designed for standard use and is specifically compatible with the HP Officejet Pro 8600 model. This black ink cartridge by HP is a reliable and high-quality option for printing black documents and images with crisp and clear results. Expiration date Jun 2010.