Marathon M4 Lab Type Micromotor Unit. Excellent quality high-speed Dental Micromotor in the dental lab. The fine grip and high resolution provide smooth cutting and finishing. Marathon Dental Micromotor made of durable and strong material that has a long working life. The micromotor produces low vibration, no extra noise and heat while working. Connecting wire and power button makes the use of Dental Micromotor easy and convenient.