we can supply the square from 30*30-600*600mm, thickness: 3-25mm. and Material: ... 44, ASTM A53 and so on. we can supply the square from 30*30-600*600mm, thickness: 0.8-25mm. and ... , Q345B, ST 37, ST 44, ASTM A53 and so on. Square tubeZinc coating60-100g/m2Size15*15-300*300mm O.D tolerance ... MT (10,000KGS)4.Delivery period : 10 to 30 Days square tube