Manual Metal Arc welding Electrode Dia: [ Manual Metal Arc welding Electrode Dia: 3. 15 mm, class A1 ( Rutile type ), Type of coating: Medium, conforming to the Spec. No. IRS: M28/ 2020, Code ER4112 as per IS: 814- 2004 with Amendment No. % u20181 % u2019 of October 2005 & % u20182 % u2019 of March 2008. ]