Weight: 1.3 oz (35 g); Dimensions: 1.7 x 0.9 x 1.0 inches (44 x 23 x 25 mm); Torque (4.8 v/6.0 v): 16.6 / 18.2 lbs (6.6 / 8.2 kg); Speed (4.8 V/6.0 V): .45 kg). *Analog Servo.

(From Amazon.co.jp)
With its low profile design, strong torque and precision movement, the HS-75BB is a great choice to move your retract gear in a realistic manner that you need. Note, this is a retract or "bang " servo and only travels from one end to the other (180 degrees). If you require a proportional servo this size, use the Hi-tech HS-77BB. Specifications Motor Type: 3 Pole Bearing Type: Top Ball Bearing Speed (4.8V/6.0V): 0.45/0.34 sec @ 180 deg. Torque oz./in. (4.8V/6.0V): 92/114 Torque kg./cm. (4.8V/6.0V): 6.6/8.2 Size in Inches: 1.73x0.90x0.98 Size in Millimeters: 43.94x22.86x24.89 Weight ounces: 1.23 Weight grams: 34.87.