The Eclipse 20420 Electrode Extension is an ignition system component designed for industrial and commercial combustion equipment. It works by extending the reach of the ignition electrode, allowing a reliable spark to be delivered to the burner for proper fuel ignition and stable combustion. Commonly used in burners, boilers, furnaces, and other gas-fired HVAC and process heating systems, it supports dependable ignition performance. Its durable construction enhances ignition reliability, improves burner efficiency, reduces startup issues, supports safe system operation, and helps maintain consistent long-term performance in demanding heating applications.