... constant temperature, safty, long last time. PTC heater is very appropriate under 260℃ temperature. Main appliances: ... hair straightener, hair curler (crimper), wax melting heater, humidifier, water boiler, liquid warmer, coffee warmer, polymer ... connection is necessary for two or more PTC connection. Plastic shell heating elementModelsLength/ mmWidth/ mmthickness/ mmApplied voltage/ ...