This is the Savox SB-2251SG Speed & Torque 6.0V Brushless Standard Size Steel Gear Digital Servo.

Features:

• Versatile balance of Speed & Torque in a Brushless Servo.
• Combines leading edge technology with super high 12 bit (4096) resolution and unique steel gears.
• Ideal for use in 6.0V applications.
• Brushless motor provides longer life and cooler operating temps.
• Extremely strong unique steel gears ensure long-life and durability.
• The full aluminum case design not only looks good but also allows for cooler and smoother operating temps.
• Our servos are totally green _ÑÐ from materials to production, these servos are environmentally friendly.
• Ideal for giant scale aircraft, monster truck, 1/8 scale.

Dimensions(mm): 40.3x20x37.2
Weight(g): 68.0
Speed(@6.0V sec/60): .085
Torque(@6.0V oz-in): 208
Gear: Unique Steel
Bearing: 2BB
Case: Full Aluminum
25 Tooth Spline
Frequency: 250-333hz
Pulse Width Frequency: 1520