This is the ElectriFly by Great Planes 9G micro servo used in the Gee Bee sport scale airplane.
Features: Replaces worn or damaged servos in the Gee Bee
Includes: 9G Micro Servo with 1.5 (38mm), Double Sided Arm 0.51 (13mm) single, sided arm 1.1 (28mm), four point horn and two mounting screws
Dimensions: 0.90 x 0.49 x 1.1 (23 x 12.5 x 27mm)
Weight: 0.32oz (9g)
Note: Specs such as torque and speed are not provided by manufacturer