The 4” x 4” 1.5 kW Flange-Mounted Heater Element is designed for spas and hot tubs. Operating at 120V, this element is built for optimal heating performance, ensuring your spa maintains the perfect temperature. Its 4" x 4" flange design, combined with a 30" NEMA cord, makes it easy to install and replace. Constructed from durable Incoloy, this heater element is compatible with a variety of systems including Watkins, Hot Springs, and others, providing reliable and long-lasting service.