20kg/cm Digital Servo with Red Coated Aluminum Case Item No.: DS3120MG Motor: iron core Gear: metal Weight: 64g Size: 40x20x40.5 mmmm Rotation scope: 180�° or 270�° controlled / 360�° continue for option Speed and Stall Torque 15Kg.cm/0.16sec/60�°@5.0V 18Kg.cm/0.15sec/60�°@6.0V 21Kg.cm/0.14sec/60�°@6.5V