This OHMITE part RJS4R0E is a reliable and high-quality wirewound rheostat designed for various applications. It has a resistance of 4 Ohm with a tolerance of 10%, allowing for precise and accurate control of electrical current. The rheostat has a power rating of 50W and features a 1-turn electrical adjustment and a 1-turn mechanical adjustment for easy and convenient operation. It has a compact size of 57.16mm X 58.67mm X 68.96mm and is designed for panel mounting with solder lugs for secure and stable installation. This OHMITE wirewound rheostat is a reliable and efficient component for electrical circuitry and offers excellent performance and durability.