Kato 24-844 N Scale Automatic Three-Color Signal Power Supply [1 pc] T-Maxx Parts These are the 12mm Hex

These are the 12mm Hex Adapters from Traxxas

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Installs in diff housing on either front or rear wheels

Two GTR Composite Shocks

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Kato 24-844 N Scale Automatic Three-Color Signal Power Supply [1 pc] T-Maxx Parts These are the 12mm HexKato 24 844 N Scale Automatic Three Color Signal Power Supply [1 pc] Power your Kato automatic three color signals with this dedicated signal power supply. It provides the electrical feed the signal system needs to cycle its aspects automatically as trains pass, using Kato's standard plug in connectors for a clean, solder free hookup. A core component for adding working signals to any Kato Unitrack layout, and expandable with Kato's signal extension