1、Material: Aluminum alloy material can reduce the temperature of for Orange Pi in use to a certain extent, and the heat dissipation function is more efficient. 2、With Silicone Pad: Comes with thermal conductive silicone for efficient heat dissipation. 3、Heat Dissipation Groove: The upper cover of the casing is designed with a heat dissipation groove, which increases the heat dissipation surface area and better protects the motherboard (excluding for Orange Pi motherboard!). 4、Simple Black: The simple black design fits perfectly with the interface of the corresponding motherboard. 5、Easy To Install: Reserve the hole for the antenna, the opening is accurate, one to one correspondence, and completely fit the development board, which is easy to install. Item Type: Heatsink for Orange Pi Zero 2 Product Material: Aluminum Alloy Product Size: Approx.62 x 55 x 15mm / 2.4 x 2.2 x 0.6in (The Size After Installing The Motherboard) Colour: Black Applicable Model: for Orange Pi Zero 2 (Excluding for Orange Pi Zero 2 Motherboard) 1 x Aluminum Alloy Cover 1 x Aluminum Alloy Lower Cover 3 x Silicone Thermal Pad 4 x Screw 4 x Nut 8 x Plastic Pad