Led Ecr, Universal Plug-In Style Qecx-61, Ac Lamp Proving Relay (Metal To Carbon) For 110V Ac Led Signal Lamp, 4F/4B Complete With Plug Board, Connectors, Retaining Clips Etc. And Conforming To Specification No. B Rs.941A, Sts/E/Relays/Ac Lit Led Signal /09-2002, Amd.1. .Irs:S-34/68 Amd.6 & S-23/88 Amd.1 Or Latest. The Int Erlocking Code For This Unit Shall The Abdhk. Inspection By Rdso [ Warranty Period: 30 Months After The Date Of D Elivery ] [Quantity Tolerance (+/-): 5 %Age , Item Category : Normal , Total Po Value Variation Permitted: Max 8 La Cs ] ]