This is a Westwood single block electrode, part number E5-199Z1. Brand new in the box. It's a replacement ignition electrode specifically designed for Cleanburn CB 500 and A2 series oil burners or boilers. If your burner is having trouble sparking and lighting the fuel, a worn electrode is a common culprit. This is the exact part you need to get it firing reliably again. UPC is 000551992618. Westwood is a known brand in heating parts. Installation is usually straightforward if you're familiar with your burner – just make sure to set the gap correctly. A critical component for keeping your heating system running, especially in the colder months. Don't let a small part like this leave you in the cold. Order the genuine Westwood part for a perfect fit and reliable performance.