aluminum tube 1.round or square tube or pipe 2.wall thickness 0.5-40mm 3.diametre 6-180mm aluminum tubeWe ... coatingColor: Silver white, Bronze, Champagne, Black VarietyAlloyTemperSize(mm)DiameterWall thicknessThin-wall pipe1x,3x,5x seriesO,H14,H34,H326~1300.5~52x ... ,6x,7x seriesO,T4,T66~1300.5~5Thick-wall tube1x,3x,5x,8x seriesH112,O,F20~1805~402x,6x ...