Detailed Product Description 1)Round steel tube:size from 6mm to 100mm,thickness from 0.17mm to 2.5mm2)Square steel tube:size,10*10mm,15*15mm,20*20mm,25*25mm,30*30mm,thickness from 0.17mm to 2.5mm3)Rectangualar steel tube:size,10*20mm,15*30mm,20*30mm,thickness from 0.17mm to 2.5mm4)Material:Q195,Q195L5)Availiable in rolled steel strip and galvanized sheet belt in a range of specifications