Precisely crafted hole position Easy to install The black aluminum alloy material can reduce the temperature of the orange pi board in to a certain extent, and the heat dissipation function is stronger. Aluminum alloy passive heat dissipation works more efficiently and better protects the motherboard The black and simple design perfectly fits the interface of the corresponding motherboard. Applicable :For Orange Pi 3 Size:85x56x22mm Note: Not Included for Orange Pi 3 Motherboard Colour:black Material:aluminum alloy Package Contents: 1 x Aluminum Alloy Upper Cover 1 x Aluminum Alloy Lower Cover 1 x Screw Pack 3 x Heat Conducting Pad 1 x Cooling Fan 1 x Screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.