1 x HO scale model railroad 2 heads block signal LED GreenYellowRed light #K33Ky and stop when magnet trigger

and stop when magnet trigger reed switch again

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you may use the following boards:

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1 x HO scale model railroad 2 heads block signal LED GreenYellowRed light #K33Ky and stop when magnet triggerStore Home New Arrival Ending Soon Add to Favourites View Feedback Contact us Store Categories USA store HO Scale OO scale O Scale N Scale Light Emitting Diode LEDs Grain of Wheat Bulbs Wholesale Buy In Bulks Switches Connectors G Scale Z Scale Electronic Component Resistors Nintendo DS Nintendo GBA SP UK store HO gauge OO gauge O gauge Light Emitting Diode LEDs N gauge Switches Connectors Grain of Wheat Bulbs Wholesale Buy In Bulks G gauge Z gauge