Copper Coated mild steel wire 4mm dia class W- 1 with combination of Agglomerated SAW Flux Class F- 1 as per IRS M39/ 01 ( Latest ) in ratio of 1. 1kg ( Wire ): 01kg flux suitable for multirun submerged arc welding of steel IS: 2062- 11, IS: 1875- 92 Class 1 & 1A and other equivalent steel.