Precisely Made Hole PositionEasy to InstallBlack aluminum material can reduce the temperature of the orange pi plate to a certain extent, and the heat dissipation function is stronger. Aluminum passive heat dissipation works more efficiently and better protects the motherboardThe black and simple design perfectly matches the interface of the corresponding motherboard. Applicable Model: for Orange Pi 3Size: 85x56x22mmNote: Orange Pi 3 motherboard not includedColor: BlackMaterial: Aluminum Package Contents:1 x Aluminum Top Cover1 x Aluminum Bottom Cover1 x Screw Set3 x Thermal Conductive Washer1 x Cooling Fan1 x ScrewdriverOnly the above package content, other products are not included. Note: Light reflection and different displays may cause the item's color to be a little different from the real thing. Measurement error is +/- 1-3cm