... tube with bending 6000 series T3-T8 anodized,sand blasted,powder coated,etc bended into various angles aluminum bending tube ... aluminum pipe, aluminum pipe with bending high quality aluminum bending tube 1.Material:AL 6063 ... Surface treatment: mill finished, anodized, or the customized.4.Features: punching holes on the two ends. extruded aluminum tube with bending