Led Ecr (Qecx) Relay Plug In Type Style Qecx 61(Ac Led All Aspects) Ac Lamp Proving Relay Unit Slow Release Neutral Line Relay 4F/4B Contacts, Front And Back Contacts Metal To Carbon ,Shall Be Suitabl E For Working In Series With The 110V/15W Ac, Led Signal Complete With Plug Board Retaining Clip And Conne Ctors. Conforming To Brs.941A, Irs: S 34 & Irs: S 23 &Sts/E/Relays/Ac Lit Led Signals/092002 Or Latest. Th E Interlocking Pin Code For This Unit Shall Be Abdhk [ Warranty Period: 30 Months After The Date Of Deliver Y ] ]