1. Transparent acryli material, clear vision and good looking. ( please tear up the film on the acrylic before use ) 2. Precision cutting for Orange Pi 4 , for motherboard 3. Support install the fan on the top, not worry about overheating. 4. Metal material, 3 x aluminum + 2 x copper, provide fast passive cooling 5. Covers almost all heat dissipation locations on the motherboard color:as shown Material: acrylic+metal Package Contents: 1x Acrylic Case 1x Cooling Fan 5x Heat Sink 1x 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.