NOTE: 0.8mmx100x140mm, the size 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 up to 401w / mk, and common copper thermal conductivity is barely 20-30w / mk CPU and GPU graphics card within the inside a part of the laptop computer utilizing a thermal plastic thermal conductivity, thermal plastic at extreme temperature for decades easy to aging, and in the end lost, leading to overheating of the CPU or GPU, the Laptop won't start after overheating. And this copper warmth sink clear up thermal problems caused by common crashes laptop, etc