Product Specifications: Length 3.9 inches (100 mm) x Width 2.4 inches (60 mm) x Height 0.4 inches (10 mm) Weight: 2.5 oz (72 g) Material: A6063 aluminum alloy. Product Overview: Aluminum heat sinks set of 3. It dissipates electronic devices such as AV and audio equipment, computers, AC adapters, and automotive goods, protecting electronics sensitive to heat, and preventing heat explosion. Wide range of uses: 3D printers, vacuum tubes, amplifiers, motors, tablets, smartphones, ipads, laptops, CPUs, IC chips, routers, modems, PS4, PS5, game consoles. Please rest assured that after-sales support is also available in Japan. 30 day quality guarantee for any reason, we will respond quickly for you. [Precautions] There may be small scratches or scuffs caused by the manufacturing process, but this does not affect the performance of the heatsink. Thank you for your understanding. We are committed to the quality of our products, but in any chance, if there are any defects that affect the performance of the product, we are very sorry, but please contact our customer support. We will do our best to solve any problems.