Editorial Review This is the Savox SB-2273SG High Voltage High Torque Brushless Unique Steel Gear Digital Servo. Features: Combines leading edge technology with super high 12 bit (4096) resolution and unique steel gears. Super light-weight. Brushless motor provides extremely high speed, high torque, incredible efficiency, and amazingly low power consumption. The aluminum case design not only looks good but also allows for cooler and smoother operating temps. Savox servos are totally green " from materials to production, these servos are environmentally friendly. Ideal for 1/8th or 1/10th scale trucks and buggies (electric & nitro) and giant scale aircraft. Also suitable for use in boats and helis. Dimensions(mm): 40.3x20.2x38.5Weight(g): 69.0Speed(@6.0V sec/60): . 12Torque(@6.0V oz-in): 319.4Speed(@7.4V sec/60): . 095Torque(@7.4V oz-in): 388.8Gear: Unique SteelBearing: 2BBCase: Full Aluminum25 Tooth Spline is compatible with Futaba servo hornsFrequency: 250-333hzPulse Width Frequency: 1520 Dimensions(mm): 40.3x20.2x38.5Weight(g): 69.0Speed(@6.0V sec/60): . 12Torque(@6.0V oz-in): 319.4Speed(@7.4V sec/60): . 095Torque(@7.4V oz-in): 388.8Gear: Unique SteelBearing: 2BBCase: Full Aluminum25 Tooth Spline is compatible with Futaba servo hornsFrequency: 250-333Pulse Rate Frequency: 1520Frequency: 250-333Pulse Rate Frequency: 1520