This is the HS-5056MG Digital Ball Bearing Metal Gear Sub Micro (Feather) Servo from Hitec.

FEATURES: Programmable Ball Bearings Overload Protection Metal Gears Light Weight Ideal for park flying, indoor planes, small gliders, MAV. and micro electric helis

INCLUDES: One HS-5056MG Digital BB MG Sub Micro Servo with pre-installed small X-shaped servo horn and screw One 26mm straight servo arm One 35mm straight servo arm Four 1.7x7.9mm flanged button head screws

SPECS: Operating Speed: 0.12sec/60° at 4.8V 0.10sec/60° at 6.0V Output Torque: 1.2kg-cm (16.66oz-in) at 4.8V 1.4kg-cm (19.44oz-in) at 6.0V Weight: 12.7g (0.45oz) Size: 22.6 x 11.6 x 24mm (0.88" x 0.45" x 0.94")  

BOX DIMENSIONS: 2.00" W. X 1.63" H. X 2.00" L. BOX WEIGHT: .05 LBS.