SMAKN&reg; Metal Gear MG945 12KG High Torque Speed Digital Servo for RC Car Boat Plan Product Model MG995/945/996 products size 40.7 * 19.7 * 42.9mm Weight 55g Work to torque 13KG/cm reaction speed 53-62R / M use temperature -30 ~ +60  Dead-set 4 microseconds plug type JR FUTABA general rotation angle up to 180 degrees Servo type analog servos operating current of 100mA voltage of 3-7.2V Structural material metal copper teeth, coreless motor, double ball bearing no load Operating speed of 0.20 seconds / 60 degrees (4.8V); 0.16 seconds / 60 degrees (6.0V)