This is the Spektrum A3030 Sub-Micro Digital Hi-Torque Aircraft Servo.
This servo's lightweight plastic gears, digital precision and incredible 28 oz/in torque rating is ideal for any slow and park flyer aircraft. Its speed is still better than average at 12 sec/60° @ 4.8, so it’s the best of both output worlds. The low deadband technology means that you’ll enjoy reliable accuracy and precision.
The A3030 is the perfect combination of lightweight and holding power performance at a great price. Ball bearing support around the output shank helps keep the servo precise for many flights to come.
Size Category: Minis and Micros
Application: Slow and park flyer aircraft
Torque: 23 oz-in (1.66 kg-cm) @ 4.8V / 28 oz-in (2 kg-cm) @ 6V
Speed: .12 sec/60° @ 4.8 / .10 sec/60° @ 6V
Length: .93 in (23.6mm)
Width: .45 in (11.5mm)
Height: 1 in (25.5mm)
Weight: .3 oz (8.6 g)
Bushing Or Bearing: Bearing
Motor Type: Cored
Connector Type: Z-connector
Gear Type: Nylon
Gear Material: Plastic
Voltage: 4.8 or 6.0V