supply of relay plug in type style qecx61relay plug in type style qecx61,relay plug in type style qecx61 ac led all aspect ac lamp proving relay unit with inbuilt current transformer type slow release neutral line relay 4f -4b contacts f ront and back contacts metal to carbon shall be suitable for working in series with th e 110v ac led signal, lamp rated at 15w confirming to rdso spec. sub item id: 3100385001, relays -- miniature, plug-in type, tractive armature, m to c, universal ac lamp proving relay, style qe cx, 4f-4b contact, for 110 v ac led signal lamp code abdhk spec: brs:941a,sts/e/relays/ac lit le d signal/09-2002 amdt1, irs s-23 & 34, str: siq 0420 ver.1. it is also attached vide sn/3-84. [ warr anty period: 30 months after the date of delivery ] ]