... brass, ceramic, stainless steel.Some samples of uses.Heating water for shower, ducking bath, footbath, washing ... other liquid.Notice in appliance.PTC as a heating element, it fits for high safety, slap-up ... PTC heater.For more information of our water heating element, please visit our websitehttp://www.tiancheng-ptc ... en\ptc4.html Other types of PTC heating element, please visit our website marked in the ...