... .drilling,punching,welding We can supply with aluminum alloy exttrusion profiles with hign quality and nice prices.1) shapes: square tube ... ,; length: as your request, longest 12m4) Surface treatment: mill finishing, anodizing, powder coating, electrophoresis, wood grain and so on,5) Color available for ... , drilling, tapping, milling, stamping, and welding u shape aluminum extrusion profiles