PECO SL-300F N Gauge Code 55 Flexible N/Silver Track One Box of 30 36 Length. BRAND NEW IN SEALED CASE! SL-300F N Gauge Code 55 Flexible N/Silver Track One Box of 30 (36 Length). PECO STREAMLINE N CODE 55. FLEXIBLE TRACK WITH WOODEN SLEEPER. PECO Streamline N Gauge Code 55 – Universal Fine trackage system Despite a low visible rail height of just 1.4mm, all brands of N Gauge model locomotives will run on this track. The ingenious rail section of PECO 55 combines strength and durability with a highly realistic appearance and uses the same universal rail joiners as Code 80; the geometry of this range has been cleverly designed to make it easy to build convenient, complex and aesthetically pleasing formations. For more details on Electrofrog turnouts, see our Wiring the Layout publications Nos 4 and 21. Recommended to be used with. SL-310 Conducting Rail Joiners: Nickel Silver for PECO Code 80/55 track. SL-311 Insulated Rail Joiners for PECO Code 80/55 track. SL-14 Track Fixing Pins: Chemically blackened mild steel for unobtrusively pinning down trackwork.