This stainless steel scale rule is a valuable tool for modelling in British N Gauge. 
It shows scale measurements from 3ins to 50ft, marked at 1:148 scale. 
It also includes markings for track gauge and spacing.
 Recommended to be used with: 
SL-310 Conducting Rail Joiners: Nickel Silver for PECO Code 80/55 track 
SL-311 Insulated Rail Joiners for PECO Code 80/55 track 
SL-14 Track Fixing Pins