supply of relay qbca1 ac immune, plug in type, style , dc baised point contractor, 24 v, 2f (hd), 4b, contacts, front contacts, (heavy duty) and back contacts, mtal to carbon, complete with plug board, reatining clip and connectors, conforming to specification no. brs: 943, irs: s-34 and irs:s-23 (as applicable). the interlocking code for this unit shall be bcejk.relay qbca1 ac immune, plug in type, style , dc baised point contractor, 24 v, 2f (hd), 4b, contacts, front contacts, (heavy duty) and back contacts, mtal to carbon, complete with plug board, reatining clip and connectors, conforming to specification no. brs: 943, irs: s-34 and irs:s-23 (as applicable). the interlocking code for this unit shall be bcejk.,relay qbca1 ac immune, plug in type, style , dc baised point contractor, 24 v, 2f ( hd), 4b, contacts, front contacts, (heavy duty) and back contacts, mtal to carbon, complet e with plug board, reatining clip and connectors, conforming to specification no. brs: 943, i rs: s-34 and irs:s-23 (as applicable). the interlocking code for this unit shall be bcejk. [ warr anty period: 30 months after the date of delivery ] ] , relay qbca1 ac immune, plug in type, style , dc baised point contractor, 24 v, 2f ( hd), 4b, contacts, front contacts, (heavy duty) and back contacts, mtal to carbon, complet e with plug board, reatining clip and connectors, conforming to specification no. brs: 943, i rs: s-34 and irs:s-23 (as applicable). the interlocking code for this unit shall be bcejk. [ warr anty period: 30 months after the date of delivery ] ]