The polarity (or train direction) of the rails is shown on the product. Add to Favourites.
Train-Tech TT1 - LED Multi Gauge Track Tester DCC/DC For N/H0/00 Gauges ++ RM48P
Gaugemaster GM52 - LED Multi Gauge Track Tester DCC/DC N, H0/00 Gauge RM48 Post
Train-Tech TT10+ - LED Multi Gauge Track Tester DCC/DC - H0/00/0/G Scales 1stpos
Train Tech Multi gauge Track Tester N/TT/HO/OO Gauge TT1
TTTT10 Train Tech Multi Gauge Track Tester for OO/O/G Scales
Train Tech TT10+ OO HO O G Multi-Gauge Track Tester for DC & DCC Railways
