Our 18 Qt. rectangular stone heater is designed for full body massages where a full stone set is required. The professional looking stainless steel body matches the stainless steel lid. The lid features a silicone handle for quick removal. The removable Porcelain water reservoir allows for easy clean-up. The temperature dial is simple to read and use and has a pre-heat setting for fast heat-up. It is built to commercial standards, is UL listed and features a grounded three prong plug. It comes with a one year warranty.