NOTE: 0.8mmx100x140mm, the length is NOT 150mm,pls be noticed Specifications Color: copper Material: copper Size: 100x100mm,100x150mm,100x200mm, 200x200mm,200x300mm,300x300mm Thickness: 0.5mm 0.8mm 1mm 1.2mm 1.5mm 2mm 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 as much as 401w / mk, and traditional copper thermal conductivity is just 20-30w / mk CPU and GPU graphics card in the inside part of the laptop using a thermal plastic thermal conductivity, thermal plastic at hot temperature for many years easy to aging, and in the end lost, leading to overheating of the CPU or GPU, the Laptop won't beginning after overheating. And this copper warmth sink resolve thermal issues caused by widespread crashes laptop, and many others