Our 18-quart hot stone heater provides 100 hot stone heating capacity, rapid heating times, “cool wall touch” technology, and compact convenience to provide a truly holistic hot stone experience. This heater is perfect for heating stones for manicures, pedicures, and facials, massages, or when higher volumes are needed. 115V High-quality heater designed specifically for heating massage stones Suitable for 100-piece hot stone massage sets Cool Touch Handles for improved handling Teflon coated removable water reservoir for an easy to clean finish Temperature control features a "preheat" setting of 375 degrees Fahrenheit to heat water quickly "Operating range" of 120-150 degrees Fahrenheit lets you rapidly bring the stones up to the desired temperature for therapeutic use, and then maintains a constant, even heat. Outside dimensions are 23" x 14" x 10". The stone heaters are very easy to use. Fill the bowl with cold water and adjust the temperature desired for your treatment. Maintain the temperature via the temperature gauge until your treatment is complete. The heater is made of stainless steel and the lid is made from aluminum. This construction makes it long-lasting, rust-free, and an overall efficient design.