Features: Compact protective box for OrangePi 4/4B development board Made of super heat dissipation aluminum alloy material. Simple design, easy to install with standard screws . Unique making process, bring different texture design. with 2 pieces thermal conductive silicone pads, you can put on the processor and memory chip of the development board for better heat dissipation. Specifications: Material: Auminum Alloy Color: Black Fit for : for Orange Pi 4 /4B LTS Development Board for Case Size: approx 99.3x62.5x26.2mm/3.91x2.46x1.03in Package Type: Metal Shell /Metal Shell with Antenna Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1 PC x Alloy Shell