1. Machine die-casting, oxidation treated with beautiful appearance. 2. aluminum, good heat dissipation and shielding signal performance. 3. Can be used for decoders, controllers, electronic products, heat-dissipating aluminum casing, printed circuit board wiring aluminum box, thunder protection aluminum shell, DIY, etc. 4. The thickness of the board is between 1.25~1.5mm,strong enough. 5. Good looking sand black color ,high end and elegant. Aluminum Alloy Project Box DIY Sand Black Enclosure Electronic Protection Case Item Type:Enclosure Size:55 x 106 x 200mm / 2.17 x 4.17 x 7.87in Flap Thickness:1.25~1.5mm It's DIY kits, needs to finish by yourself. Color: Black Material: Aluminum Alloy Package Contents: 1 * Electronic machine housing 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.