... 5mm-10mm 4)zinc:300g-400g 45-70um Galvanized Steel TubeDescription & Specification:(1) Quality:Q195 Q215 Q235 ... 8M, 6M, 12M or special length,(7) Chemical Composition: Steel No: Q195, Q235; C: 0.20, P: ... Thickness: 45-70um, 80-400g/m2(9) Mechanical Properties:Tensile Strength: 320-460/m2Yield Strength: 195N/m2Elogation ... threaded at both ends, one end with steel socket and the other end with plastic cap ...