... 3.Size:thickness:1mm-25mm 4.Length:6m 2013 HIGH QUALITY AQUARE RETANGULAR STEEL PIPE 1.Grade:Q195, Q235B, Q235C ... Grade Q195, Q235B, Q235C, Q235D, Q345B, Q345C, Q345D, Q345E, 20#, St33, S235J0,S235J2G3, S355J0, S355J2G3, S355J2H,SS330, SS400 Type ... meter or per customers' requirementSection 15*15mm-600*600mm, Section:35*15mm-600*400mm Application Mechanical equipment, solar energy equipment, steel ...