Micro servo 

Brushless motor 

Designed for multiple applications including

1/24 scale but will need the upgraded servo mount 

Dig unit 

Shifting servo 

Mini b 

Specs: 

Torque - 115oz @ 6v / 134oz @ 7.4v / 151oz @ 8.4v 

Speed - .075 @ 6v / .062 @ 7.4v / .055 @ 8.4v

Dimensions - 23*12*27.5mm

*NOTE: YOU NEED TO SET ENDPOINTS PROPERLY OR YOU WILL BURN UP THE SERVO AND VOID THE MANUFACTURER'S WARRANTY* 

Grab a Nano Servo horn here.