Datasheet

Also sell flat and twisted male-to-female servo extension cables.
Servo cable color convention
 brown or black = ground (GND, battery negative terminal)
 red = servo power (Vservo, battery positive terminal)
 orange, yellow, white, or blue = servo control signal line
Note: Cable color may vary from what is shown in the product picture. Possible color combinations are
black, red, and white or brown, red, and orange.
Specifications
Dimensions:
 Length: 24 in
General specifications
 Gender: Female-Female
 Style: Twisted