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.
Peco SL311 N Gauge Insulated Rail Joiners/Fishplates (Pack 12)
Hornby R920 OO Gauge Insulated Rail Joiners/Track Connectors/Fishplates (Pk 12)
Peco Streamline OO Gauge - Insulated Rail Joiners - SL-11
TOMIX N Gauge Mini Rail Set Point Set MB Pattern 91082 Railway Model Rail Set
TOMIX N gauge Siding Rail Set Rail Pattern-B 91026 ModelTrain Tracks Set Tomytec