aluminum tube Material: aluminum alloy Diameter: 19mm,22mm,25mm,28mm,32mm Surface treatment: spray-painting,electroplating aluminum tubeMaterial:aluminum alloyDiameter:19mm ... treatment: spray-painting, electroplatingAluminum tube, aluminum round tube, industrial aluminum tube1) Material: Aluminum alloy2) Diameter: 19mm,22mm,25mm, ... reuqest. OEM orders are welcome. commodity aluminum alloy round tube