Q-Series Neutral Line Relay (Qn1 Type ), 12F/4B, 24V Dc Complete With Plug Board(Base Plat E), Connectors And Retaining Clips Etc And Conforming To Brs- 930 And Rdso Specn.No.Irs:S-34 & S-23 . Th E Interlocking Code For This Unit Shall Be "Abcde". [ Warranty Period: 30 Months After The Date Of Delivery ] ]