Characterized by intelligent temperature control, high airflow, hydraulic bearings and high speed operation, this case fan can effectively cool down your desktop computer case and extend the life of your computer. What this cooling fan can offer is that it can effectively reduce the operating temperature of the host, enhance its performance and reduce power consumption. It is constructed of ABS material. The length of this product is 12cm and width is 12cm. It is used to cooling the PC computer case. Item Name: Heat Sink Material: ABS Features: High Air Volume, Low Noise, High-speed Speed: 1200RPM Noise: 30dB Service Life: 30000H Bearing Type: Oil Bearing Heat Dissipation Method: Air Cooling Size Details: L: 12cm/4.72", W: 12cm/4.72" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Heat Sink