The HP 57 C6657AN Tri-Color Inkjet Print Cartridge is a single unit ink cartridge designed for HP printers. This cartridge is compatible with universal and HP-branded printers and utilizes inkjet and thermal print technology. The color options include cyan, yellow, and magenta, making it ideal for a variety of printing needs. With an expiration date of March 2010, it is essential to ensure the cartridge is still valid for optimal printing results.