The rheostat is consisted of ceramic core and a resistive wire wrapped to form a toroid coil with a wiper axle. Product Name : Rheostat Control the electrical resistance of a circuit without interrupting the of current. Can be used widely as light dimmers and motor speed control, is applicable for arc lamps, pumps, fans and blowers, respirators, dental and model trains or other applications that require high voltage and current., Manufacturer: Mcnhbdgg