Harm of static electricity to humans: With a very large amount of charge on the surface of an object, creating an extremely strong magnetic field in the surrounding environment, in the long term, will affect human health, especially the system. nervous system, genitourinary system, circulatory system..

Can be used continuously in High temperature environment - up to 230°C and maximum at 260°C. Aluminum brake system instead of normal plastic brake one for longer life time. The wheel will roll easily thanks to the ball bearings.