The OHMITE RNS10RE is a wirewound rheostat, a type of variable resistor commonly used in industrial applications requiring precise control of electrical circuits. These rheostats are known for their robust construction, high power handling capabilities, and ability to withstand harsh environments. They are subject to mechanical wear and have a finite life. Models H, J, K, L, and N are listed under UL File No. E-10946 and CSA File No. 21309. All rheostats have a 10% tolerance.