Tenders for Supply of Rs Resistor Field Weakening For 3 Shunting Notches With Punched Grid Elements For Wag7 Locomotives As Per Clw Specn. No. Clw/Es/R-39 Alt-D. Mounting Details As Per Sketch No. Clw/Es/Sk-14/R-39 Alt-D. Each Set Consisting For Two Trays. Warranty Period: 30 Months After The Date Of Delivery