Feature: 1. PROFESSIONAL DESIGN: PTC thermostat heater plate surface temperature is 220℃, wire length is 15cm, high temperature resistant, durable and easy to install. 2. CONSTANT TEMPERATURE: PTC heater plate using ceramic heating technology, continuous heat output, automatic constant temperature work. 3. INSULATED: PTC heating element internal use of polyimide film wrapped chip, insulation and temperature resistance. Can be dry burning for a long time. 4. SAFE AND NON TOXIC: PTC heating element plate uses with no open flame, no redness, no toxic and harmful gas, suitable for use in humid environment. 5. EFFICIENT: PTC will quickly convert electrical energy into heat after power on, and conduct to the surface of the aluminum shell within 10S. 6. LONG LIFE: This thermostatic heater plate can work 7x24 hours without interruption, continuously provide heat source life of more than 20,000 hours. Specification: Item Type: PTC Heater Plate Material: Aluminum Alloy, PTC, Polyimide Film Shell Material: Aluminum Shell Heating Material: PTC Ceramic Heater Wire Material: High Temperature Resistant Wire Product Size: Approx. 25 x 21 x 5mm / 0.98 x 0.83 x 0.2in Wire Length: Approx. 15cm/5.9in Surface Temperature: 220℃ Temperature Error: ±10℃. Package List: 5 x PTC Heater Plate Note: 1. Please follow the use of voltage for power supply, the use of other voltage may cause fire and product damage.2. Manual measurement, please allow some errors.