A heat sink is a passive heat exchanger that fers the heat generated by an electronic or a mechanical device, thereby allowing regulation of the device's temperature at optimal levels. In computers, heat sinks are used to central processing units or graphics processors. Heat sinks are used with high- semiconductor devices such as istors and optoelectronics such as light emitting diodes (LEDs), where the heat dissipation ability of the component itself is insufficient to moderate its temperature. Made of high quantity aluminum, good thermal conductivity. Reduce the risk of hardware failure due to overheating. Designed to maximize its surface area in contact with the cooling . Light weight and used in applications where weight is a big concern. Widely use for computer, IC, electric device, LED light devices, etc. Material: Aluminum Tooth Number: 23 Color: Silver Package Contents: 1 x Heat Sink Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.