SAVÖX SH-0253 - Digital Micro Servo
The Savox SH-0253 micro, digital servo has a nice balance of torque and speed in addition to using a combination of industrial plastic and metal gears for added durabilty and smoothness.

Features:
Aluminum middle case allows for cooler operating temperatures
Industrial plastic and metal gear train ensures durability and longevity
Ideal for small planes  and 450 size helicopters

Specifications:
Torque @4.8V: 1.8kg/cm
Torque @6V: 2.2kg/cm
Speed @4.8V: 0.13 sec/60 deg
Speed @6V: 0.09 sec/60 deg
Dimensions L x W x H: 22.8 x 12.0 x 25.4mm
Weight: 13.6g

Technical Details:
Operating Temperature: -10° to 50°C
Running Current (no load): 150mA @4.8V, 180mA @6.0V
Stall Current (at locked): 1000mA @4.8V, 1200mA @6.0V
Idle Current: 5mA @4.8V, 5mA @6.0V
Wire Length: 250 ± 5mm
Output Gear Spline: 21 Tooth
Bearings: 1BB
Operating Travel: 90° (1000 - 2000 µ second)
Neutral Position: 1500 µ second
Pulse Width Range: 700 - 2300 µ second
Maximum Travel: Appx 150° (700 - 2300 µ second)
Refresh Rate: 240 Hz
Motor Type: Brushed