ITEM NAME:30Pcs 15mmx15mm Heatsink Copper Shim Thermal Pads for Laptop GPU CPU VGA Product Description Description: 100% Brand new and high quality The copper has high purity coefficient of thermal conductivity as high as 407 w/ (m†¢K) With this copper pad to greatly lower GPU temperatures, can be used for graphics, northbridge, CPU chips. It can be applied to HP, Dell, Acer, Thinkpad and all laptop and computer heatsink solution! Material: Copper Color: As the picture Size: Approx. 15 x 15 x 1mm (L*W*T) How to use: First daub a little thermal silicone grease (FYI: Do not use the low-end silicone grease), then put the right size copper shims, then daub a little thermal silicone grease again, last install the heatsink and tighten the screws Included: 30 x Heatsink Copper Shim.How to use: First daub a little thermal silicone grease (FYI: Do not use the low-end silicone grease), then put the right size copper shims, then daub a little thermal silicone grease again, last install the heatsink and tighten the screws.