Description This is the Savox SG-0351 Standard Digital Servo. Features: Strict production and quality control of plastic components Totally Green – from materials to production, these servos are environmentally friendly. Ideal for throttle servo and park flier airplanes. Specifications: Dimensions(mm):  40.7X20.2X37.0 Weight(g):  41.0 Speed(@4.8V sec/60):  .22 Torque(@4.8V oz-in):  44.4 Speed(@6.0V sec/60):  .17 Torque(@6.0V oz-in):  56.9 Gear:  Industrial Plastic Bearing:  1BB 1MB Case:  Plastic 25 Tooth Spline Compare With – Futaba: S3004, S3003, S3001; Hi-Tec: HRC35485S; JR: DS811