Hollow center motor with a 10mm free inner diameter w/200 counts per revolution. Specially designed rotor disc with an embedded spring, locking taps and the encoder positioned around the circumfrence. Ø30mm stator, with interlocked rotor discs, and hollow shaft (Outer diameter Ø12, Inner diameter Ø10, Length 24mm). Mounted on base plate 42*62mm and connection to High Resolution controller, included. The 2.6 Million High Resolution Twin Motor Kit includes a main motor board, placed upon a controller board, and free PCBMotor software for speedy integration and application prototyping. The High Resolution Twin Motor Kit board is connected to a PC and powered by a standard USB cable. It communicates through a simple protocol that allows custom-made software to quickly and easily access and control both ultrasonic motors.