... Square Steel Tubes Square Steel Tubes O.D:1mmX1mm---1500mmX1500mm W.T:0.2mm---50mm SPOTS GOODS AT PRESENT: 2864.57 Welded Square Steel Tubes ... with the standard of SY/T5037-2000, GB/T9711.1-1997 and API SPEC 5L, ... the most competitive price from us here. StandardJIS, GB, DIN, ASTM, APIStandardJIS G3455-2005, JIS G3452- ... 2004, JIS G3456-2004, JIS G3457-2005, GB/T 9711.1-1997, DIN 1626, DIN 1629 ...