a x a or (a x b): 16mm x 16mm - 800mm x 600mm THICKNESS: 1mm - 60mm ASTM, AS, EN, etc. Gr.A, Gr.B, Gr.C, S355, Grade 350, etc Standards,ASTM A500 A,B,CASTM A847 / A847M - 11 Standard Specification for Cold-Formed Welded and Seamless High-Strength, Low-Alloy Structural Tubing with Improved Atmospheric Corrosion ResistanceBS 6363, BS1139, Gr 34, Gr. 43BS 4360 Gr. 43 CDIN 2395DIN 1615DIN 2458DIN ...