Tenders for Supply of Silicon Diode For The Wag-7 Type Locomotive, Hirect Make High-Capacity Rectifier Type S-43 Ar-5 10 Or Ruttonsha Make Diode Type Osd 550 N 43 Sq For Rsi Block 56 Diodes. Make/Brand: Hirect/ Ruttons Ha Make Only. Material To Be Supplied By Oem Or Their Authorized Dealers Only Warranty Period: 30 Months After The Date Of Delivery