... ~40GB4437GB/T4437.1GJB2381large size TubeVarietyAlloyTemperSizemmAdopted StandardDiameterWall thicknessTube1xseries,5A02,5A03,5A05,5A06,3A21,2A11,2A12,6A02,7A04,7A09H112120~40010~40GB44372A11,2A12,6A02 ... , claddings, hubs etc.Capable of for wide on every side.. aluminum pipes & tubes