... tube1.Materials:6000 series such as 6061,60632.Finishes:extrusion, aging, cutting,drilling,anodizing3.Heat treatment: T5,T64 ... Certificates:ISO 9001:20087Standard: GB5237-2008 Chinese high precision. 8Equipments:1,Extrusion production lines.2,Anodizing and electrophoresis production ... blue, glod and so on. We can supply you high quality aluminum tubes for different usage.If you have any question ...