This is the Great Planes Dean's Micro Adapter to JST Female.

 

FEATURES: Connects a battery with a Dean's Micro connector to an ESC with a JST Male connector
INCLUDES: One Great Planes Dean's Micro Adapter to JST Female
REQUIRES: Connecting between battery and ESC SPECS: Connector #1: Deans Micro (Positive (+) Pin) Connector #2: JST Male (Terminal Gender: Male / Housing Gender:Female Wire: 20AWG 1.96" (50mm) long Weight: 1.82g (.064oz) Maximum Recommended Current: Limited to the JST connector, 5A
COMMENTS: A plug's gender is determined by the terminal, not the housing.