Features: Experience efficient heat dissipation and reliable durability with metal case. Aluminum alloy shell provides excellent durability and protections for your OrangePi 3B board. All ports and slots can perfectly matchthe Orange Pi 3B board. Aluminum shell not only provides good heat dissipation, but also provides additional protections for your mainboard Easy installation, all installation components are included. Specifications: Size：approx 85x56x22mm/3.35x2.2x0.87in Material:Aluminum Alloy For: for OrangePi 3B Cooling Heatsink Case Kit Package Includes: 1PC Aluminum Alloy Case 1PC Cooling Fan 4PCS Heatsinks 1Set Screws 1PC Screwdriver 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. Does not include OrangePi 5 5B Board