This is the Hitec HS-5625MG Digital High-Speed 2BB Metal-Geared Programmable Servo with the Universal Connector.  The universal connector allows this servo to work with JR, Hitec, Futaba, and Airtronics Z wiring and radio systems.  These are an affordable way to outfit that next giant-scale plane, helicopter, or 1/10th to 1/8th scale car or truck.  This includes a blue aluminum, heat-treated servo arm.

Features:

• EPA, Speed, Direction, and Fail-Safe Programmable
• MOSFET amplifier
• Gold plated contacts
• Three metal gears
• Dual ball bearings
• Indirect drive long life potentiometer
• High standing torque
• Watertight and dustproof
• Includes blue aluminum, heat-treated servo arm
• Works with fixed winged aircraft up to 40 pounds, helicopters, as well as 1/10th and 1/8th on- or off-road vehicles

Includes:
One digital high torque servo with 12" wire and S/JR/Air-Z connector
One white small X-shaped servo horn.
One red Large X-shaped servo horn.
One white adjustable servo horn.
One white off-set straight servo horn.
One white disc servo horn.
One blue aluminum, heat-treated servo arm horn.
Four 2 x 14mm mounting screws
Four brass eyelets
Four black rubber vibration isolators.

Specifications:
Speed: 0.17 sec/60° at 4.8V
Speed: 0.14 sec/60° at 6.0V
Torque: 109.7 oz-in at 4.8V
Torque: 130.53 oz-in at 6.0V
Length:  1.59" (40.6mm)
Width:   0.77" (19.8mm)
Height:  1.48" (37.8mm)
Weight:  2.11oz (60g)

Comments:
Programming the failsafe and other settings is done with the Hitec servo programmer (available separately).  The included metal servo horn will fit any Hitec servos that have a "+" stamped on top of the output shaft.