... 20mm 2.OD:15*15mm-600*600mm 3.Gal shs,rhs,chs 4.Build structure etc. galvanized hollow ... section CHS,SHS,RHS,GAL.Tianjin Haiyunda Metal Material Co.,Ltd. ... bulk or other requestsMOQ10 metric ton per sizePaymentTT,L/C,West Union or other payment by negotiationETCL7-30days ... pipe/tube,Steel strip,Hollow section pipe/tube/channel(C,U,V,H,I,figure-8 etc.),Tyre ...