... various 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 items ... coating, nickel plating, powder painting or from customer's requirement. E. Material: aluminum alloy 6063, 6061 or from customer's ...