This is the Hitec HS-56HB Sub-Micro Feather Universal Servo for use with park flyers, high performance electric models, and gliders up to 2 meters.  Because this has the universal connector, it will work with JR, Hitec, Futaba, and Airtronics Z radio systems.

Features:

• Ball bearing
• Karbonite gears
• Upright or flat mounting tabs
• Compatible with Futaba J, Hitec, JR and Airtronics Z receivers

Includes:
One servo with Hitec S style Connector and pre-installed 1" 4 arm servo horn
One 1" (25.4mm) long single arm servo horn
One 1-3/8"(35mm) double arm servo horn
Four 3/8" (10mm) long screws (for mounting the servo into your model)

Specs:
Length: .88" (23mm)
Width:  .45" (12mm)
Height: .95" (24mm)

Speed: 0.12sec/60° @ 4.8V     0.1sec/60° @ 6V
Torque: 16.66 oz-in  @4.8V    19.4 oz-in @ 6V
Weight: 11.2g (0.39oz)