1)GB5237.1-5237.5-2008,SGS certificate,ISO9001:2000 2)World-advanced aluminium further fabrication line 3)Vertical Quenching 1)Alloy/Temper:6005,6061,6060,6063,6082,T3,T4,T52) Thickness:a) Minimum: 0.9mmb) Maximum: 25mm2) Outer diameter:a) Minimum: 9mmb) Maximum: 250mm3) Packing: Inner packing: plastic film; Outer packing: wrapped with brown paper or as customer's request Aluminium tubes