... /1100/3003 aluminium tube 1)surface treatment:anodise,polished finish,etc. 2)colour :silver, red,blue.etc. Kunshan Changfa Aluminium Products Co.,Ltd ... -9mmOuter diameter31mm-55mmApplicationThey are widly used in electronic, medical,spinning machine, aviation, shipping,military and other fields 6063/6065/1100/3003 aluminium tube