aluminum pipe: sand anodized aluminum pipe, max length is 6m aluminum pipe:Annual output:50 thousand metric tonsCertificates: ISO14001-2004 and ISO9001 -2000Material: aluminum 6005 6060 6061 6063 6082 6101 6105 6262 7005 7075Surface treatment: mill finish, anodized, electrophoresis , powder coating, wood grain transfer, sliver matt and sand blastingUsed for making curtain walls, industrial, sign, ...