U-shaped rack-mount aluminum chassis, bent aluminum sheet with silver sandblasting finish, lightweight, anti-oxidation and high rigidity. Set includes U-shaped base and vented cover plate. Pre-installed mounting studs inside base for PCB assembly. Side panels pre-cut with fan holes and port cutouts. Cover plate with double rows of louver vents for heat dissipation. Smooth burr-free edges, easy assembly. Suitable for power supplies, amplifiers and test instruments. Custom sizes, cutouts and surface finishes available.