NMRA 98-1 Standards Gauge HO Scale

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This gauge helps you to make adjustments to rolling stock and track to end annoying derailments. It will check for accurate track and switch dimensions, wheel spacing, flange depth , tire width and wobble. Also checks for structure clearance so trains can pass without hitting tunnel portals, station platforms, scenery, etc. This is a precision measuring instrument manufactured of stainless steel by the National Model Railroad Association. Instructions included. Show more