PECO Streamline N Gauge Code 80 - Universal trackage system This ever-popular trackage system for N offers a choice of either wooden or concrete type sleeper flexible track and a wide range of turnouts and crossings in both Insulfrog and Electrofrog types. Suitable for all makes of N Gauge trains and fully compatible with PECO Setrack. Two of these Y turnouts and an SL-394 Long Crossing will form a double junction.