1.Name: square steel pipe 2.Good quality and preferential price 3.Can be manufacture according to custom's requirement. Product Name:Black rectangular and Square steel pipeSize:OD15*15-600*600mm,20*30-600*800mmWall Thickness1.0-12 mmSCH30,SCH40,STD,XS,SCH80,SCH160,XXS etc.LengthAny special length is ok less than 12mSteel materialQ195 ā Grade B, SS330,SPHC, S185Q215 ā Grade C,CS Type B,SS330, ...