... 3) Various OD & thickness 4)Type: Round, square,ellipse Aluminum Alloy TubeDeatailed descriptions:Surface treatment: AnodizedOut diameter:19, 22, 25, 28 ... .8, 0.9, 1.5Usage: DifferentHardness: 130-150HBCAlloy or not: IS alloyTemper: T3-T8Al (min): 87%Wall thickness: 0.7, 0 ... bag/different packing can be required by customer competitive price aluminium alloy round tube