Copper Coated Mild Steel Wire 4Mm Dia R.D.S.O. Approved Class W-2 Combination With Agglo Merated Submerged Arc Welding Flux Class F-2 In Ratio Of 01Kg(Wire) : 01Kg(Flux) As Per Irs Spec. No. M39/ 20 Or Latest, Suitable For Two Run And Multirun Submerged Arc Welding Of Steels To Is 2062-2011 (R2016) E-3 00 And E-350, Is2002-2009 (R2018) Grade I& Ii, Is1875-1992 (R2014) Class Ii & Iia Or Other Equivalent Steel S. Make/Brand: Rdso/Icf Approved Brand Only ]