Model trains that are 1/160th the size of real trains and that operate on tracks with 2 rails that are spaced 9mm apart.
British N gauge - Wikipedia
Fox Valley Models N Scale GE ES44AH, CSX/Law Enforcement #3194
KATO USA A Leading Manufacturer of – Precision Railroad Models
The N Scale Architect Manufacturer of laser cut, cast resin
T vs Z vs N : r/modeltrains
Track Plans for N Scale - James Model Trains
Test Runs on Two Small N Scale Model Railroads
N-Scale
BEAUTIFUL Kato N Scale Big Boy Review
Bay State Model Railroad Museum N scale layout - Trains
N Scale Con-Cor/Rivarossi 0001-03201D NW 2-8-8-2 Y6b Mallet Steam
N Scale Insight - Trains
Bachmann N scale 2-8-4 steam locomotive