Designed for massage stones, this 18 quart unit is large enough for full body treatments, or for more than one client at a time. Preheat setting brings the stones up to the proper temperature quickly. Removable water reservoir with easy to clean finish. Operating temperature is 120 - 150 degrees. Stainless steel exterior. Recommended Use: All types of Stone Massage The lid must be left on for the stones to reach their desired temperature Caution: Do not handle stones with bare hands Read all instruction prior to use pls feel free to contact me if you have any question.A set of 23 pcs of hot stone massage.LOW SHIPPING COST !