Q-Series Line Relay (Qna1 Type) Ac Immunized 8F/8B 24V,Dc Along With Plug Board (Base Plate), Connectors , Retaining Clips Etc And Conforming To Brs: 931A And Rdso Spec No . Irs :S-34 & S-23 And S-60 Or Latest. The Interlocking Code For This Unit Shall Be [ Warranty P Eriod: 30 Months After The Date Of Delivery ] ]