... , Q235, Q345B, X42, Gr. B square hollow section of best quality:hollow section, good quallity and attractive price 1.Item: hollow ... -12mm 1. Commodity specificationsSquare hollow section2. Process methodCold drown, high frequency welded3. MaterialQ195---Q2354. Size a. side length15mm--600mm ... and T/T the balance 70% after seeing the copy of B/L6. Packing: international exporting package, or according ...