This is the Futaba S3114 Micro High Torque Servo.
FEATURES:
Ideal for electric planes and small electric helis
INCLUDES:
Futaba S3114 Micro High Torque Servo
One .91" x .64" (23mmx16mm) 4 arm servo horn (comes pre-installed)
One 1.33" x 1.33" (34mmx34mm) 4 arm servo horn
SPECS: 6V 4.8V
Torque: 24 oz-in (1.7 kg-cm) 21 oz-in (1.5 kg-cm)
Speed: 0.09 sec/60° 0.10 sec/60°
Dimensions: 0.9 x 0.4 x 0.8" (7/8 x 7/16 x 13/16) (22 x 11 x 20mm)
Weight: .28oz (1/4oz) (7.8g)
Lead Length: 6.5" (165mm)
Output Spline Diameter: 4mm