... :6061,6063,6082 3)surface treatment : mill finish,anodized aluminium tube 1) material :6061,6063,6082 and other aluminum alloy2)Temper : T4 , ... or other special temper3)use : can be widely used in aluminium window, door , curtain wall, hand railing ,normail aliminium profile4)advantage ... good before and after service5)delivery time : 10-20 days aluminium alloy tube