The aluminum extruded enclosure consists of two end plates, a top panel and a U-shaped bottom panel. The end plates are screwed into the extrusion with four M3 screws. Extruded aluminum enclosures are extremely useful for creating PCB enclosures, as inner slots allow for easy mounting of printed circuit boards. If the internal slots do not match the PCB board, we can add rivets to the bottom of the enclosure to fix the PCB board,it requires CAD drawing to match the enclosure.