This is the Savox SH-0263MG Super Torque Metal Gear Micro Digital Servo.
Features:
*NOTE: Certain combinations of receiver and ESC have been found to cause "Brown Out" issues when combined with Savox servos. An external BEC, or BEC stabilizing receiver capacitor may be needed for efficient, glitch free operation in low voltage electric applications.
Specifications:
Royal mail at £3.95, or Express at £6.95.
Full details at checkout.
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Apologies, we'd bow to Savox's info on this - it looks to be 25T spline, same as Futaba, Traxxas, Etc
Answered by: Ben @ Wheelspin Models