Supply Of Universal Lamp Proving Relay Ac Miniature, Plug-In Contacts 4F-4B Metal To Carbon, As Per Rdso Specn. No. Sts/E/Relays/Ac Lit Led Signal/09-2002 : Irs:S23:Rs:S34 And Spec. No. Brs:940,941A (Common For Main Subsidiary Signals) And Technical Specifications, For 110V Dc/12W Led Signal Of Main All Aspect, Calling-On, Route And Shunt Signals, Complete With Plug Board, Base, Retaining Clip And Connectors.