Standard Size Servo 360 Degree Continuous Rotation Servo - FeeTech FS5103R,
This servo rotates fully forward or backwards instead of moving to a position. You can use any servo code, hardware or library to control these servo.
The output shaft is supported by two ball bearings for reduced friction.
works with standard RC servo pulses, providing a running angle of approximately 360 Degree Continuous rotation over a servo pulse range of 1000 μs to 2000 μs.