This is the Align DS455M Metal Gear Digital High Voltage Servo, suitable for tail use with the Align T-REX 250 and 450 helicopters. The DS455M features the same speed and torque specifications as the DS455. The main difference between the two servos is that this DS455 only features a center aluminum case, with plastic upper and lower pieces, and the DS455M features a full CNC alloy case. Because of this, the DS455M is slightly heavier. 

Features: 

• Faster speed with high torque performance, allowing helicopter to perform with faster and higher precision.
• High rigidity, shock resistant metal gears with high strength composite alloy gears with durable structure characteristics.
• Aluminum alloy mid case construction for instantaneous heat dissipation, maintaining servo’s high efficiency.
• Supports digital & analog control signal.
• Powerful and precise servo, suitable for T-Rex 250/450 tail use.
• Supports 8.4V high voltage input to provide optimal speed and torque performance of the servo.

Specifications:
Stall torque: 2.2kg.cm @ 6.0V; 2.9kg.cm @8.4V
Motion speed: 0.05sec/60° @ 6.0V; 0.04sec/60° @ 8.4V
Rating voltage: DC 6.0-8.4V
Temperature range: -20°C ~ +60°C
Dimensions: 23 x 12 x 31.3mm
Weight: 20g

Includes:

• (1) DS455m Digital Servo
• (2) Socket Button Head Self Tapping Screw
• (1) Socket Screw
• (2) Servo Arm