Hitec RCD 33325S HS-325HB Standard Ball Bearing Servo Speed (4.8V/6.0V): 0.19/0.15 sec @ 60 degree Torque oz./in. (4.8V/6.0V): 42/51, Torque kg./cm. (4.8V/6.0V): 3.0/3.7 Size in Inches: 1.57x0.78x1.43, Size in Millimeters: 39.88x19.81x36.32 Weight ounces: 1.51, Weight grams: 42.81