Feature: Graphene is the most efficient heat conductor in the world. Its thermal conductivity can reach 5300W/m.K, while pure copper is 386.4W/m.K and aluminum is 237.2W/m.K. You can use temperature software to test the temperature before and after installation, and you will find it more efficient than other radiators. When the computer temperature drops, the system will crash less and run more smoothly and reliably. Available in four options: no printing, 4G printing, 8G printing, and 16G printing to meet your needs. Easy to install and remove. The ultra-thin heatsink is designed for notebooks and small-space heat dissipation. Heatsink only; other accessories shown in the picture are not included. Specifications: Item Type: Heatsink Material: Pure Copper, Graphene Size: 66x25x0.5mm / 2.5x0.9x0.01in Color: Black Type: No printing, 4G printing, 8G printing, 16G printing (Optional) Quantity: 1 Piece Note: No retail packaging. 1cm = 10mm = 0.39inch Please allow 1-3mm error due to manual measurement. Please ensure you are comfortable with this before purchasing. Due to differences between monitor displays, the image may not reflect the actual color of the item. Thank you. Package Includes: 1 x Heatsink