1. Full aluminum material, well protection for motherboard. 2. The upper surface of the shell is designed with multiple grooves, which is more conducive to the distribution of hot air. 3.The CPU, RAM and other module positions are provided with silicone thermal pads to make heat dissipation more efficient. 4. 30x30 cooling fan provide better passive cooling.(connect to 5V and GND pin) It is suitable for Orange Pi 5 Plus. The label is random, 't accept the specified Colour:black Material:aluminum Package Contents: 1 x Aluminum Alloy Cover 1 x Aluminum Alloy Base 1 Set x Heat Conduction Pad 1 Set x Screws Nuts 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.