Description: 【Reliable Performance】: This heater features   temperature resistant construction for long term, stable use ,can  operate in high humidity environments (up to 95% RH),  【 Ceramic Heating Technology】: Utilizes PTC thermistor   for consistent, self regulating heating. Automatically maintains a steady temperature output without overheating 【 Rapid Heat Transfer】: PTC Ceramic Air Heater  Quickly converts electrical energy into heat surface reaches working temperature within 10 seconds after powering on. For optimal performance, use with a fan to distribute warm air efficiently 【Material】:  Made of PA66 housing, corrugated aluminum, ceramic chip,which is sturdy for long term use  【 Versatile Applications】:    PTC Heating Electric Heater for space heaters, humidifiers, bathroom warmers, air purifiers, hair dryers, clothes dryers, pet beds, ventilation systems, and automotive interior heating Specification: Heating method: Heat conduction through moving air Heating material: PTC thermistor Wire material: Silicone Temperature tolerance: ±10°C Mounting hole diameter (mm) 4.5 Mounting hole spacing (mm) 81.5 Size Chart: 9.2cmx3.1cmx2.5cm/3.62inchx1.22inchx0.98inch Hole Space: 8.15cm/3.21inch   Package Includes: 1  PTC Ceramic Air Heater(220V ) Note: Please allow slightly errors due to manual measurement and different monitors.