Zyyini 10 pcs 20 * 20mm Copper Sheet Shim Piece Heat Sink Thermal Pad for GPU CPU Laptop, 6 Thicknesses, 401 wmk, Solves Frequent Crashes (0.8mm) - Zyyinid2tksahup7-03

• Provide 6 kinds of thickness (0.3/0.5/0.8/1.0/1.2/1.5MM) for you to choose. Thermal conductivity is up to 401 w/mk, very nearly silver's thermal conductivity 409 w/mk, much higher than ordinary copper pad (20-30w/mk) Exposed to the air, the copper will inevitably oxidize and turn dark, but the cooling effect does not be affected. If you still worry about it, you can polish the of this copper shim by fine sandpaper or toothpaste. Can solve laptop frequent crashes and other problems caused by thermal conductivity. Can be applied to the desktop computer north and south bridge connection, graphics card thermal conduction.