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