Ripmax Quartz QZ553 Servo Brushless HVThe This high quality, high performance servo is intended to appeal to discerning modellers that only want the best. It's plastic case, ball race, metal gears, regular motor and digital amplifier provides the perfect solution to your servo needs at an unbelievable price. The case centre is CNC machined from solid Aluminium for the very best in strength and rigidity. The Main Case is made from heavy duty plastic helping to reduce cost and weight. Check