... treatment 3.machining as customers' requirements Anodized aluminum pipe's specification: Radian20 degrees, 25 degrees,35 degrees ... Fringe-milling, rolling, stamping, mouth-narrowing/broadening, hole/bore-making, surface-grinding, mouth-broadening, mouth-shrinking, bending,sharpening,and shaping ... not rest easy.C. It's aluminum alloy bent pipe, good for many ways, for example: housedhold, hareware ...