The Worcester 87161019010 Electrode Set (Flame & Ignition) MD39 is a replacement part designed specifically for Worcester storage tank water heaters. This set includes electrodes for both the flame and ignition systems, ensuring your water heater operates efficiently and effectively. As a genuine Worcester product, you can trust in its quality and compatibility with your heating system. Easy to install and reliable in performance, this electrode set is a practical and essential component for maintaining your hot water supply.