Porcelain 9 Tonne Insulator (Ri 6020-1) (1050 Mmcd) For 25Kv Ac 50Hz Single Phase Over Hea D Traction Lines As Per Rdso Spec No. Ti/Spc/Ohe/Ins/0071 [ Warranty Period: 30 Months After The Date Of Deliv Ery ] ]