HOn3 SCALE MODEL RAILROAD ( TRAINS )

HOn3 Narrow Gauge: 1:87.1 scale, 3 FOOT GAUGE. HOn3 Scale: Gauge: 0.413” (10.5mm) Modeling American 3 foot gauge, HOn3 is the most popular variant of HO in the UNITED STATES; the most popular narrow gauge modeling scale. HOn3 requires its own specially made track, because its gauge isn't close enough to standard gauge in any of the smaller scales for track compatibility. It uses track with rails gauged at 12mm