MG90S is a great servos for the price. Withstand plenty of hard hits and are fairly accurate. Perfect flap servos. If you have a sailplane and need great flap servos, buy them. Awesome price for Metal gears! Works great on 450 size rc helicopter.

• Light weight high strength nylon casing
  
• Durable partially metal gear with one bearing
  
• Recommended for 200-450 size helicopters or light weight aircraft
  
• Different servo horns included for different application

• Dimensions: 22.8 x 12.2 x 28.5mm
  
• Operating Speed (4.8V no load): 0.1sec/60 degrees
  
• Operating Speed (6V no load): 0.08sec/60 degrees
  
• Stall Torque (4.8V): 1.8 kg/cm
  
• Stall Torque (6V): 2.2 kg/cm
  
• Temperature Range: -30 to +60 Degree C
  
• Dead Band Width: 5usec
  
• Operating Voltage: 4.8 - 6.0 Volts
  
• Weight: 13.4g

• 1 x Tower Pro MG-90S Mini Metal Gear Servo (Analog)
  
• 1 x Set of Servo Arm