Easy to install The black aluminum material can reduce the temperature of the orange pi board in use to a certain extent, and the heat dissipation function is stronger. Aluminum passive heat dissipation works more efficiently and better protects the motherboard The black and simple design perfectly fits the interface of the corresponding motherboard. Precisely crafted hole position Applicable model:For Orange Pi 4 Note: Not Included For Orange Pi 4 Motherboard Colour:black Material:aluminum Size:91 x 56 x 23mm Package Contents: 1 x Aluminum Upper Cover 1 x Aluminum Lower Cover 1 x Screw Pack 5 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 cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.