... tube 3.Size:thickness:1mm-25mm 4.Length:6m 2013 HIGH QUALITY AQUARE RETANGULAR STEEL PIPE 1.Grade:Q195, Q235B, Q235C, ... *400mm Application Mechanical equipment, solar energy equipment, steel structure, auto part, bridge pile foundation, barrier, inner structure of vessel, decoration, ... Visit:About us: Our products are very popular because of high-quality and reasonable price. As we have been in this ...