Square Hollow section pipe material: Q195,Q235,Q345,20#,45# etc. Siza:10* ... -600*600mm W.T.: 0.5-12.0mm CommoditySquare hollow section pipeMaterialQ195-Q345, GR.B,20#,45# etc.SpecificationERWLength3-17m or ... ,000Ton/MonthContactName: Dan LvMobile :86-13920276850Square hollow section pipeTianjin Lange steel pipe manufacturing CO,. LTD.Tel:86-22-59516111Fax:86-22-59516266 ...