... *600mm 3.Gal shs,rhs,chs 4.Build structure etc. galvanized hollow section CHS,SHS,RHS,GAL.Tianjin Haiyunda Metal Material ... ton per monthOther ProductOval steel pipe/tube,Welded pipe/tube,Galvanized pipe/tube,Steel strip,Hollow section pipe/tube/channel(C ... ,U,V,H,I,figure-8 etc.),Tyre chain and so on.