Features: Surface insulation, safe, reliable and offers a long service life. Constant temperature heating, no open flame, heat up quickly. With mounting holes, easy to install. This system is energy saving, when the heater increases the environmental temperature, the power will reduce gradually within certain ranges. Applicable for heater, humidifier, drying machine, air conditioning and other commonly used appliances. Specifications: Condition: 99.99% Brand Heat Material: PTC Thermistor Color: Silver Rated Power: 400W Rated Voltage: 12V Size: approx. 150 x 68 x 18mm / 5.91 x 2.68 x 0.71inch Installation Distance between Holes: approx. 137 x 55mm / 5.39 x 2.17inch Hole Diameter: approx. 3.5mm / 0.14inch Weight: approx. 111g Package Included: 1 x PTC Heating Element 1Surface insulation, safe, reliable and offers a long service life 2Constant temperature heating, no open flame, heat up quickly 3With mounting holes, easy to install 4This system is energy saving, when the heater increases the environmental temperature, the power will reduce gradually within certain ranges 5Applicable for heater, humidifier, drying machine, air conditioning and other commonly used appliances