Basic Features:1.Made of high quality Aluminum, good thermal conductivity 2.Reduce the risk of hardware failure due to overheating 3.Maximize surface area Designed in contact with the cooling air. The 11pcs fins increase the area of the board and thus provide for greater heat transfer 4.Widely used for computer, Power Transistor, FET, IC, Power Amplifier, Voltage Regulator, SCR etc. 5.Please make sure that the size of the heat sink fits that of your component. Product Paremters: Material: Aluminum Fin: 27 Color: Silver Size: 150 x 70 x 37 mm / 5.91 x 2.75 x 1.42 Inch,4pcs 10*35*10mm Heatsink Kit with Conductive Adhesive Tape. Quantity: 3 Weight: 8.74 oz Used for : Various mini DC converter circuit board computer, Power Transistor, FET, IC, Power Amplifier, Voltage Regulator, MOSFET, SCR etc. Package: 1x Aluminum Heat Sink Cooling Fin Note: 1. Please check the specification table and make sure that the size of the heatsink fits that of your component. Thank You! 2. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.