NMRA standards provide the primary basis upon which Interchange between equipment and various North American scale model railroads is founded.
Model train gauges with the NMRA standards provide model railroaders a way to check all important dimensions of a track and rolling stock as follows:
If cars do not run correctly, these NRMA gauges will help you pinpoint the trouble.
The pocket size model train gauge is a railroad tool that should be in every serious modeler's kit.
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