Specification Brand : Diyeeni BulletPoint1 : 【6 Kinds of Thickness】Provide 6 kinds of thickness (0.3/0.5/0.8/1.0/1.2/1.5MM) for you to choose. BulletPoint2 : 【High Thermal Conductivity】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). BulletPoint3 : 【Cooling Thermal Pad】Can solve laptop frequent crashes and other problems caused by thermal conductivity. BulletPoint4 : 【Application】Can be applied to the desktop computer north and south bridge connection, graphics card thermal conduction. BulletPoint5 : 【Good Cooling Effect】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. Color : 1mm CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier : 4712057602002 ExternallyAssignedProductIdentifier1 : 0746771161006 ExternallyAssignedProductIdentifier2 : 746771161006 ExternallyAssignedProductIdentifier3 : 0715538952805 ExternallyAssignedProductIdentifier4 : 0654936717732 ExternallyAssignedProductIdentifier5 : 04260188464889 ItemName : 20 * 20mm Copper Shim, 10 Pcs Efficient Fast Heat Dissipation Shim Piece Heat Sink Thermal Pad Suitable for GPU CPU Laptop, 6 Kinds of Thickness Optional(1mm) ItemPackageDimensions_Height : 7.62 centimeters ItemPackageDimensions_Length : 0.0508 centimeters ItemPackageDimensions_Width : 5.08 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : desktop-computer-heatsinks Language1 : english Language2 : english Manufacturer : Diyeeni Material : Aluminum ModelNumber : Diyeenitum0oipg3x-04 MountingType : Panel Mount NumberOfItems : 1 PartNumber : Diyeenitum0oipg3x-04 ProductDescription : Features: 1. Provide 6 kinds of thickness (0.3/0.5/0.8/1.0/1.2/1.5MM) for you to choose. 2. Thermal conductivity is up to 401 w/mk, very nearly silver's thermal conductivity 409 w/mk, much higher than ordinary copper pad (2030w/mk) 3. 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. 4. Can solve laptop frequent crashes and other problems caused by thermal conductivity. 5. Can be applied to the desktop computer north and south bridge connection, graphics card thermal conduction.