Procurement Of Relay, Plug In Type, Style Ql1, Magnetically Latched, Neutral Line, 24 V Dc, 11f, 4b, Contacts, Front & Back Contacts Metal To Carbon, Complete With Plug Board, Retaining Clip And Connectors Conforming To Brs:935a, Irs:s-34 & Irs:s-23 Amdt. Up To Date As Applicable. The Interlocking Code For This Unit Shall Be Abdeg Etc..