Feature:1. Sandblasting Surface: Surface sandblasting and oxidation treatment, with orrosion resistance and high texture.2. Good Sealing: Has waterproof and sealing effect, and protects the instrument to work well in harsh environments.3. Screw Mounting: The aluminum box is designed for screw assembly and has built in grooves for easy installation and carrying.4. Aluminum Alloy: Made of aluminum alloy material, light in weight, with good heat dissipation and signal shielding performance.5. Multiple Usages: Used for power amplifier shells, circuit board shells, decoder shells, industrial equipment shells, etc.Specification:Item Type: Aluminum Alloy EnclosureColor: Matte SilverMaterial: 6063-T5 industrial extruded aluminum alloy profileProduct Size: Approx. 25 x 40 x 110mm / 1 x 1.6 x 4.3in(there is a slight error in manual measurement)Aluminum Box Thickness: Between 1.25-1.5mmProduct Structure: Split typeApplication: 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 Main Aluminum Shell(Large and Small)2 x Boards8 x ScrewsNote:Please allow 1‑3mm error for manual measurement.