Whitehall Thermalators maintain a constant water temperature and come standard with exposed heating elements. These units provide for comfortable and effective moist heat therapy, promoting both easy cleaning and safety. The tank body, lid, bottom and tank housing are all made from type 304 stainless steel for years of trouble-free use. The color coded Thermal-Packs fit onto a sturdy stainless steel, vinyl coated wire rack. Inside the unit is a heating element and temperature sensor. Units have a snap-off thermal protector to prevent overheating. A drain valve located on the back of the units makes them easy to clean. Mobile units feature heavy duty casters. This unit includes 12 standard thermal packs.