NMRA HO Scale Standards Gauge Mark IVb
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NMRA HO Scale Mark IVb Standards Gauge


More than 6 In Stock [Ships 1-2 business days]



Developed by, and manufactured for, the National Model Railroad Association, Inc (NMRA). Use this pocket-size gauge to check all critical dimensions of your HO scale track and rolling stock. Includes complete instructions.


  • Gauge of track and turnouts
  • Flangeway gauge and depth
  • Wheel gauge
  • Coupler height
  • Points gauge
  • Platform height
  • Tunnel and train clearances

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