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Description: 100% brand new and high quality. Feature: Graphene is the most efficient heat conductor in the world，Its thermal conductivity can reach 5300W/m·K, pure copper only 386.4W/m·K and aluminum only 237 2W/m·K. You can use the temperature software to test the temperature before and after installation， you will find that it is more efficient than other radiators. When the computer temperature drops, the computer will crash less and run more smoothly and more durable. Two types: chute and grid pattern design, increase the heating cooling area. The bottom polishing technology is seamless and will leave no gap. It is suiatble for PC computer, laptops, notebooks and hard disk to dissipate to extend their life time. Comes with the silicone thermal pad and rubber band, has an excellent performance and the cooling effect is more obvious. Easy and conveneint to install and remove. Specifications: Item Type: Heatsink Material: Pure Copper Size: 70x20mm/2.7x0.7in Thickness: 2mm/0.07in, 3mm/0.11in, 4mm/0.15in, 1.5mm/0.05in Color: Black Type: Chute Pattern, Grid Pattern(Optional) Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Heatsink 1 x Thermal Pad 3 x Rubber Band