Peco Rail Joiners insulated for code 100 rail Designed to be used with the OO.HO Code 100 Track Systems from Peco. Design prevents adjacent rails from touching whilst holding them in alignment. Insulated rail joiners are required to provide electrical breaks where Electrofrog turnouts are used. OO gauge track from the world-renowned brand Peco. Hobbies stock a vast range of excellent Peco products for your model railway set. Whether you are a complete beginner or an experienced model maker you find a great selection at Hobbies. OO Gauge.