1)Aluminium shell,Electric energy shell,Aluminum Electronic housing,Aluminum power case2)Metal ... cutting,lathing,milling,drilling,tapping,punching, CNC machining, Anodizing(natural color,silver,black,gold etc.), powder coating,brushing,burring ... ,silkprint.) 7,Packing. Aluminium shell,Electric energy shell,Aluminum Electronic housing,Aluminum housing,Metal shell,Aluminum power case,Metal enclosure, ...