... Black and galvanized scaffolding tube Size: 40mm 42mm 48.3mm 60mm Zinc coated: 300g, 350g, 400g/square ... .0mmThickness1.0-4.0mmOuter diameter42mm, 42.3mm, 48mm, 48.3mm, 48.6mm, 60mmLengthMax 16metersStandardBS, ASTM, ASME, EN, DIN, ... GB, JISMaterialQ195, Q215, Q235, Q345ApplicationPetroleum, power, gas metallurgy, papermaking, chemical, ...