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National Model Railroad Association - #3 Standards Track Gauge - HOn3 Scale


Quick Overview

Developed and manufactured by the NMRA, this HOn3 gauge is an indispensable tool that makes it easy for you to check all critical dimensions of your track and rolling stock.

The HOn3 track gauge can measure:

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

Includes complete instructions
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Availability: Out of stock