This is the Savox SA-1256TG Standard Digital "High Torque" Titanium Gear Servo. The SA-1256TG pushes 277.2 (20 Kg) oz of torque and this servo is perfect for those who are looking for a minimized backlash to use in the wings of RC planes. The SA-1256TG sports titanium and metal gears to keep things strong and running smooth. 

Features:
Combines leading edge technology with super high 12 bit (4096) resolution and titanium gears
Super light-weight
Coreless motor provides high speed, incredible efficiency, and low power consumption
Titanium gears ensure long life and durability
The aluminum case design not only looks good but also allows for cooler and smoother operating temps
Our servos are totally green - from materials to production, these servos are environmentally friendly
Ideal for plane applications where a minimized backlash is needed
Specifications: 
Dimensions(mm): 40.3x20.2x37.2 
Weight(g): 52.4 
Speed(@4.8V sec/60): 0.18 
Torque(@4.8V oz-in): 222.2 (16 kg)
Speed(@6.0V sec/60): 0.15 
Torque(@6.0V oz-in): 277.7 (20 Kg)
Gear: Titanium & Aluminum 
Bearing: 2BB 
Case: Aluminum 
Spline: 25 Tooth