This is the 2NR Micro Plug from WS Deans.
It is a non-polarized plug with gold-plated pins.

FEATURES
Plastic connector body, Red in color
Non-polarized
Gold-plated pins

INCLUDES
One male-male connector (pins on both sides)
One male-female connector (pins on one side)
Two pieces of small Red heat-shrinkable tubing
Two pieces of small Black heat-shrinkable tubing

REQUIREMENTS
Solder, soldering iron (HCAR0775) or soldering gun

SPECIFICATIONS
Overall length connected: .940" (24mm)
Length of plastic body, connected: .574" (14.6mm)
Pin length, six places: .181" (4.6mm)
Width between pins: .058" (1.4mm)

COMMENTS
The connector is NOT compatible with small White
Futaba transmitter battery connectors.