This is the Series 10 Gauge Wire Harness from Castle Creations.
FEATURES: Connects two battery packs in series enabling the voltage to be doubled
INCLUDES: Series 10 Gauge Wire Harness with two Deans male plugs and one Deans female plug
REQUIRES: Connecting to batteries and electronic speed control
SPECS: Wire Length Between Connectors: 5" (127mm) Wire Size: 10 gauge