square pipe Material :304 price:usd 800/ton fob tianjin Size :all size square pipefeatures :1)Round steel pipe common size (dia):16,19,22,25,32,35,38,40,42,48,2)Square steel pipe common size :13x13,15x15,19x19,38x38,50x503)Rectangularsteel pipe size:10x20,14x20,40x504)Other special size :surface;hot galvanzied or blacklength:5.8mm,6mmas per the demands square pipe