Specifications Color: copper Material: copper Size: 100x100mm,100x150mm,100x200mm, 200x200mm,200x300mm,300x300mm Thickness: 2.5mm 3mm 4mm 5mm 6mm Pure Copper T2 99.9% 100x100mm Copper Plate Heat sink Pad GPU Cooler Radiator Copper Sheet Heatsink LED Amplifier IC Heat Dissipation This Copper Shims thermal conductivity up to 401w / mk, and regular copper thermal conductivity is just 20-30w / mk CPU and GPU graphics card in the within part of the laptop utilizing a thermal plastic thermal conductivity, thermal plastic at high temperature for a long time clean to aging, and finally lost, leading to overheating of the CPU or GPU, the Laptop won't beginning after overheating. And this copper warmth sink clear up thermal disorders caused by frequent crashes laptop, and many others