sheet metal square tube steel: 1) Thickness:0.5-60mm 2) ... 600mm 3) L:2~11.8m 4) Material: sheet metal square tube steel 1.size:10*10mm-600*600mm2.thickness:0 ... ,Q215,Q235,Q345, 20#, A53 A/B, A106 B/C, St37, St52Outer diameter10*10~600*600mmWall thickness0.5~60mm Length2 ... so onThird party inspectionSGS,BV, Lloyds etcMOQ5mtPaymentT/T,L/C or negotiation.Delivery time15-30 days after receive your deposits ...