1、Aluminum Alloy: Made of excellent aluminum alloy, this board is strong, corrosion resistance, comes with a long life span. 2、Heat Dissipation Groove Design: The upper cover of the casing is designed with heat dissipation grooves to increase the heat dissipation surface area and better defend the motherboard. 3、Perfect Fit: The design of this board perfectly fits the interface of the corresponding motherboard. Accurate, one to one openings, easy to install. 4、Easy to Install: Comes with complete accessory, you can quickly install the board on your motherboard. 5、Silicone Pads: There are silicone thermal pads in the package that our cooling capabilities will be further enhanced. 1 x Aluminum Alloy Top Cover1 x Aluminum Alloy Lower Cover3 x Silicone Thermal Pad4 x Screw4 x Nut8 x Plastic Pad Item Type: Heatsink BoardSizes: Approx. 62 x 55 x 15mm/ 2.4 x 2.2 x 0.6in (The Size After Installing the Motherboard)Product Material: Aluminum AlloyColor: BlueApplicable Model: for Orange Pi 2 (Excluding for Orange Pi 2 Motherboard)