This is the Savox SH-0262MG Super Speed Metal Gear Micro Digital Servo.: Over-spec refined design out performs ordinary micro size servo.The metal case design looks awesome and allows for cooler and smoother operating temps.Metal gears form a solid framework for precise control and operation.Strict production and quality control of plastic components.Our servos are totally green - from materials to production, these servos are .Ideal for tail servo for 250/450 class heli's and park flyer aeroplanes.