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