Pole Reverser / Polarity Switch, Power Functions, Black Wire

Reference

61929c01

BrickLink® #

bb0339c01

Pole Reverser / Polarity Switch, Power Functions, Black Wire (part 61929c01) is a LEGO element. CollectORbuild's catalog records it in 5 sets, including 4 x 4 Crawler Exclusive Edition and Crane Truck.