The HS-70MG Ultra Torque Metal Gear Servo possesses the performance qualities necessary for the new class of 42-48 inch performance 3D aircraft and 450-size helicopters. Featuring durable metal gears, cored motors, top ball bearings and generation 1 circuitry, this new addition to servo family will have all your planes and helis flying with remarkable precision and power. Fast, forceful, fantastic.