Product Description: Advantages:The copper has high purity , coefficient of thermal conductivity as high as 401w/mk . It can be applied to computer and all laptop and computer heatsink solution . Specific methods of operation:1.The original graphics chips generally has a thermal conductivity about 2MM ,lapsed after a long time, after finish BGA , replace this with a copper sheet.2.Turn the function of fan from thermostat to running ,remove the yellow line directly, the red line of fan connect to the USB powered of motherboard 3.Clean the outlet of copper thermal conductivity . Type:15mmx15mmx0.3mm ,15mmx15mmx0.5mm ,15mmx15mmx0.8mm ,15mmx15mmx1mm ,15mmx15mmx1.2mm ,15mmx15mmx1.5mm Weigth: 59g Package include:5pcs 15mmx15mmx0.3mm Heatsink Copper Shim5pcs 15mmx15mmx0.5mm Heatsink Copper Shim5pcs 15mmx15mmx0.8mm Heatsink Copper Shim5pcs 15mmx15mmx1.0mm Heatsink Copper Shim5pcs 15mmx15mmx1.2mm Heatsink Copper Shim5pcs 15mmx15mmx1.5mm Heatsink Copper Shim