The Tesla TIH 547 Premium 18" Incoloy Immersion Heater & Thermostat is a high-performance, corrosion-resistant water heating element, designed for efficiency, durability, and long-lasting reliability. Made from premium incoloy, this 18-inch immersion heater provides exceptional resistance to corrosion and scaling, making it ideal for hard water areas and high-temperature applications. The built-in thermostat allows precise temperature control, preventing overheating and optimising energy consumption. Designed for use in vented hot water cylinders, this immersion heater is easy to install and ensures a consistent and reliable hot water supply for domestic and commercial use.