Seamless extruded and drawn tubes Options Seamless extruded and optionally drawn aluminium tubes can be supplied according to ASTM and EN standards. Seamless extruded tubes Outer diameter 25 – 75 mm Inner diameter 16 – 74 mm Wall thickness 2 – 25 mm Seamless extruded and drawn tubes Outer diameter 25 – 90 mm Inner diameter 16 – 74 mm Wall thickness 3 – 25 mm