BNIB OO Gauge PECO SL-111 Insulated Rail Joiners, For code 75 & 83 rail (12 pk). SL-111 Insulated Rail Joiners, For code 75 & 83 rail (12 pk). Insulated rail joiners are required to provide electrical breaks where Electrofrog turnouts are used, for more details see our Wiring the Layout publications Nos 4 and 21.
