- This Copper Shims thermal conductivity up to 401w / mk, and ordinary copper thermal conductivity is only 20-30w / mk; - CPU and GPU graphics card in the inside part of the laptop using a thermal plastic thermal conductivity, thermal plastic at high temperature for a long time easy to aging, and ultimately lost, leading to overheating of the CPU or GPU, the Laptop will not start after overheating. - And this copper heat sink solve thermal problems caused by frequent crashes laptop, etc -With this copper pad to greatly lower GPU temperatures, can be used for graphics, northbridge, CPU chips; -It can be applied to HP, Dell, Acer, Thinkpad and all laptop and computer heatsink solution! Package Include: 15x OdiySurveil Thermal Conductive Copper Shims Dimensions: *3PCS 15*15*0.3mm Copper Shims *3PCS 15*15*0.5mm Copper Shims *3PCS 15*15*0.8mm Copper Shims *3PCS 15*15*1.0mm Copper Shims *3PCS 15*15*1.2mm Copper Shims