Servo Hitec HS-55 Manufacturer Hitec Applications Heli/Airplanes Type Analog Sub-Micro Torque 4.8V 15.3 oz/in (1.1 kg/cm) Torque 6.0V 18 oz/in (1.3 kg/cm) Speed 4.8V 0.17 sec/60 degrees Speed 6.0V 0.14 sec/60 degrees Dimensions 23mm x 24mm x 11.6mm Weight 8g Bearings - Gear Type Nylon