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 - DSAP
TRAINTECH SOUTHERN PACIFIC DAYLIGHT STEAM LOCOMOTIVES BY KENNETH G. JOHNSEN
TrainTech AL1 OO Gauge Automatic Flashing Tail Light Railway Layout Blister Pack
RK EDUCATION 'OO' GAUGE LOT OF 8 PSU V3/CDU 1/TT1/PDU1/BUS1 CONTROL ACCESSORIES
Train-Tech TT1 (GM52) Track Tester OO/HO/N Gauges
