... surface treatment 3.machining as customers' requirements Anodized aluminum pipe's specification: Radian20 degrees, 25 degrees,35 degrees,etc ... alloy, not rest easy.C. It's aluminum alloy bent pipe, good for many ways, for example: housedhold, hareware ... C. Equipments: CNC machines, bending machine, Automatic spark machine, line cutting machine, shearing machine,etc. D. Surface treatment: Anodizing, ...