Silicon diode for the WAG- 7 type locomot [ Silicon diode for the WAG- 7 type locomotive, HIRECT make high- capacity rectifier type S- 43 AR- 510 or Ruttonsha make diode type OSD 550 N 43 SQ for RSI block 56 diodes. Make/ Brand: HIRECT/ RUTTONSHA MAKE only. ( Material to be supplied by OEM or their authorized dealers only ) ]