Features: is the most efficient heat conductor in the world，Its thermal conductivity can reach 5300W/m·K Copper thermal pad conductivity only 386.4W/m·K and aluminum only 237 2W/m·K. Easy and convenient for us to install and remove. Made of high-quality material, durable, firm and stable for us to use. Supporting heat dissipation for various type SSD solid state hard disk laptop memory card cooler. Specifications: Item Type: Heatsink Material: Copper, Coating Size: As Pictures Color: Black Quantity: 2Pcs/4PCS Package Includes: 2pcs/4pcsx Heatsink note: Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3mm measuring deviation- due to manual measurement.