... , grinding, tapping, extrusion, mold design and processing, die casting, sheet metal working etcYou are warm welcome for sending any customized ... one priority.Different size and shape and surface treatment of aluminium pipes as you want1 Diameter: From a circular micro- ... diameter of 3mm to a 500mm great tube.2 Section: circle, square, rectangle, triangle, shaped and corrugate pipe3 Surface treatment: ...