Copper Coated Mild Steel Wire 4Mm Dia, R.D.S.O. Approved Class W-2, As Per Irs M39/20 Or Atest, Suitable For Two Run, Multirun Submerged Arc Welding Of Steel To Is:2062/11(R2016) E300 & E350, Is: 2002/09(R2018) Grade I&Ii, Is:1875/92(R2014) Class Ii&Iia Or Other Equivalent Steel. Make/Brand: R.D.S.O. Approved Brand Only ]