Gem Bids For 180 Galvanised Mild Steel Tubes Electric Resistance Weleded Erw Medium Quality Screwed At Both End Fi Galvanised Mild Steel Tubes Continously Welded Electric Resistance Weleded Erw Medium Quality Sc Mild Steel Hot Finished Erw Tube Nominal Bore 20 Mm Medium Type As Per Is: 1239 Pt. - Ii -1992 Both