Description This is the Savox SH-0256 Super Torque Micro Digital Servo. Features: 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 controls and operation. Strict production and quality control of plastic components Our servos are totally green – from materials to production, these servos are environmentally friendly. Ideal for CCPM and Rudder on 450 class heli’s and park flyer airplanes. Specifications: Dimensions(mm):  22.8X12.0X29.4 Weight(g):  15.8 Speed(@4.8V sec/60):  .21 Torque(@4.8V oz-in):  54.2 Speed(@6.0V sec/60):  .16 Torque(@6.0V oz-in):  63.9 Gear:  Metal & Plastic Bearing:  1BB Case:  Aluminum 21 Tooth Spline Compare With – Hi-Tec: HRC35085S