Curved double radius L/HPECO Streamline N CODE 55 Curved Turnout, Large Radius, Left Hand 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