TGY-306G-HV High Voltage Ultra Fast/High Torque MG Digital Alloy Cased Servo  3.7kg / 0.05sec / 21g - Excellent 450 Heli & 3D servo.

Model: TGY-306G-HV
Operating Voltage: 4.8V / 6V / 7.2V
Operating Speed: 0.07sec.60º/ 0.06sec.60º/ 0.05sec.60º
 Stall Torque: 2.5kg.cm /3.1kg.cm /3.7kg.cm
Size: 22.9X12.1X27.3mm
Weight: 20g
Gear Material: Metal
Gear Type: Digital
Motor: 12mm Coreless
Potentiometer: indirect Drive
Ball bearing: 2 Ball Bearing
Gear: Metal 25T
Case: Aluminum
Connector wire: 220mm
Plug: JR/Universal