This 25W 300 Ohm rheostat variable power resistor is an essential component for precise electrical control in automotive and electronic applications. Featuring a ceramic sliding disk wirewound design, this adjustable potentiometer delivers reliable performance and durability. The ceramic construction with green protective coating ensures excellent heat dissipation and long-lasting operation, while the wirewound element provides smooth, consistent resistance adjustment across its full range. The unit comes complete with a convenient black control knob for easy manual adjustment, allowing you to fine-tune resistance levels with precision. With its universal fit design, this rheostat is compatible with a wide variety of automotive and electrical systems. The package includes one rheostat and one control knob, providing everything you need for installation. Compact package dimensions of 1.5 inches make it easy to store and integrate into your projects. No assembly required - simply install and adjust to your desired specifications. Backed by a 2-year warranty for peace of mind.