Zodiac swimming pool systems and products have proven over and over to be among the leaders in the industry for all types of applications. This replacement heater flame sensor rod is designed to use with pool and spa heater models 125, 175, 250, 325, 400. It features a flange-to-tip design from the end of the ceramic to the tip of the rod. By using only the highest-quality materials and manufacturing, customers can be assured that they are receiving only the best products. Our best-in-class consumer products are the #1 choice for millions of pool owners and professionals worldwide, and with our expansive product line, we deliver the most technologically advanced, energy-efficient, durable, and reliable pool and spa products available on the market.