Micro Engineering Company N Scale Code 55 42-109 Track Gauge

The code refers to the actual height of the rail. The followings heights are used for N-scale:
- Code 80 = 0.080" tall or about 13" N scale height - the mostly used for sectional tracks.
- Code 70 = 0.070" tall or about 11" N scale height
- Code 55 = 0.055" tall or about 9" N scale height - the mostly used by modelers wishing a realistic effect for their layout. Can be used with all modern rolling stock (low flange wheels).
- Code 40 = 0.040" tall or about 6" N scale height