The Tesla TIH 515 Premium 18" Copper Immersion Heater & Thermostat is a high-performance water heating element designed for efficiency, durability, and safety. Made from premium-grade copper, this 18-inch immersion heater provides superior thermal conductivity and corrosion resistance, ensuring long-lasting and energy-efficient operation. The built-in thermostat allows precise temperature control, preventing overheating and reducing energy consumption. Ideal for use in vented hot water cylinders, this immersion heater is easy to install and delivers reliable hot water for domestic and commercial applications.