Features： 1、Aluminum Alloy: Made of aluminum alloy material, with light weight, fast heat dissipation and good signal shielding performance. 2、Good Sealing: The aluminum box has good waterproof sealing performance, and can be used in harsh environments. 3、Easy Installation: Equipped with screws, and the built in grooves for better installation, easy to use and carry. 4、Sandblasted Surface: The surface of the aluminum box is sandblasted and oxidized, with good corrosion resistance and high texture. 5、Wide Applications: Can be used as power amplifier shell, circuit board shell, decoder shell, industrial equipment shell, etc. Specification： Item Type: Aluminum Alloy Project Box Color: Matte Black Material: 6063-T5 industrial extruded aluminum alloy profile Product Size: Approx. 25 x 40 x 80mm / 1 x 1.6 x 3.1in(there is a slight error in manual measurement) Aluminum Box Thickness: Between 1.25-1.5mm Product Structure: Split type Application: Can be used for heat dissipation aluminum shell of electronic products, PCB wiring aluminum box, thunder protection aluminum shell, DIY, etc. Package List： 2 x Aluminum Shell(Large and Small) 2 x Boards 8 x Screws