This is a Traxxas Male/Female High-Current Battery Connector Set (Plugs only, no wires).
The Traxxas High-Current Connector defines the new standard for efficiency, ease of use, and high-current handling for real-world use. Large, textured surfaces on the plug bodies are easy for fingers to grip and the clever reverse-polarity protection makes Traxxas Connectors virtually impossible to plug in backwards. Shrouded wire connections eliminate the extra steps to install heat shrink tubing. Beefy, gold-plated copper terminals with large, spring-loaded contact areas ensure a perfect connection every time. Even after thousands of uses, Traxxas Connectors maintain their precision feel and incredibly low resistance.
One black female plastic connector
One black male plastic connector
Two sets of gold metal pins