This is the Hitec HS-255BB Mighty Mini Universal Ball-Bearing Servo.  This servo has a universal connector, which means it will work with Futaba, JR, Hitec, and Airtronics Z style radios.  The servo lead on this servo is about 10" long.

The HS-225 series represents a good value with performance that rivals other larger and more expensive servos.  Ideal for applications that call for a small, lightweight, high speed, high torque servo, the HS-225BB high performance mini servos feature a top ball bearing and is built with state-of-the-art SMT technology.

FEATURES: 

• Mini servo with ball bearing and plastic gears
• Great for small planes and hand launch gliders
• 3-Pole Motor
• Ball-Bearing

INCLUDES: 

• 1 - HS-225BB servo with pre-installed circular horn
• 1 - Straight horn
• 1 - "X" horn
• 1 - Adjustable arm
• 4 - Black rubber grommets
• 4 - Brass servo eyelets
• 4 - Servo mount screws

SPECIFICATIONS: 
Length - 1.27"     Weight - 0.95 oz (27g)
Width - 0.66"     Torque - 54.15 / 66.65 oz.in (4.8v/6v)
Height - 1.22"     Speed - 0.14 / 0.11 sec @ 60 deg.