Ripmax Quartz QZ508 Servo - Digital Coreless HV (0.10sec/20.32kg)This high quality, high performance servo is intended to appeal to discerning modellers that only want the best. It's plastic case, ball race, coated metal gears, regular motor and digital amplifier provides the perfect solution to your servo needs. If torque with a core less motor is what you need, this is the servo for you! Check through the specifications and performance and we are sure you will agree! The case centre is CNC machined from solid