Hot dip galvanized square tube *Dimensions:10x20-400x600/ 10x10-400x400 *Hot sale rice *Fast delivery time Hot dip galvanized square tube 1.Materia:Q195-Q235-Q345 2.Size ... )*(20-300mm) 3.Zinc coated: 60-120 g/m2ASTM A500 Galvanized square tubeStandardASTM , GB , BS , JISMaterialQ195 , Q215 , Q235 , Q345Section shapeRound , Square ...