CA136B Help keep your processor cool with the socket cooler running at optimal temperature. Extend CPU life and reliable. Protect your valuable data by keeping your computer cool. Anti-dust and easy， simple installation. 2.75 × 2.75-inch (70mm) cooling fan can keep your computer system cool. It is compatible with P4 Intel Pentium Ⅳ. DC: 12V. It is a nine bladed cooling fan.                      It makes small noise when working. Material: hard plastic. Color: black.