Note: The color of the product we ship is the color in the first picture, and the specification and quantity are shipped according to the quantity and specification described in the title. If you need to change the color or style, you need to contact us within 12 hours after placing the order. Our product description: Product Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Made of aluminium, 13 fins.4.Function: to improve the device peripheral temperature, air flow rate, reduce device power loss.5.Uses for air cooling, heat dissipation, power dissipation, circuit board cooling and so on, high-power device heat dissipation.6.Use it with a fan, the effect is better.Specifications:Product material: AluminiumColor: SilverBrand name: BQLZRNumber of Fins: 11Overall Size: 40 x 40 x 20mm or 1.57 x 1.57 x 0.79 inch (L x W x H)Base Plate Thickness: 3.1mm or 0.12 inchFin Distance: 2.4mm or 0.09 inchWeight: 204gPackage include: 5 x Heat Sinks Note: Because the model and display effect of the monitor may be different, there may be slight differences in color, and the size is manually measured, there may be an error of 1-2cm, please understand.