Designed specially to heat massage stones, these CSA approved professional stone warmers are available in two sizes. The 18 quart heater is recommended for full body treatments and the 6 quart heater is the ideal choice for spa treatments or at home use. Its attractive stainless steel exterior makes it a visually pleasing addition to your therapy room. The temperature control dial features a "preheat setting" to quickly heat the water, as well as providing an "operating range" to help maintain desired water temperature. The heaters feature a Teflon-coated removable water reservoir with an easy-to-clean finish. All heaters include an instant read thermometer.