Thomas and Friends - narrow Gauge Rusty (die cast construction) - runs on N scale track. Narrow Gauge Thomas & friends products are HO models that run on N scale track. Running from the main line at crovan's gate to the blue mountain slate quarry, the narrow Gauge Skarloey railway provides important transport for Sodor mining. Model features die-cast construction. Performs best on 11.25" Radius curves or greater.