Features:Adopts of PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency.This product is a electric heater with automatic constant temperature and energy saving.This PTC ceramic air heater has the characteristic of surface insulation and high security. Mainly used in small instruments, small box space environment temperature heating.Application: air conditioner, electric heater, instrument, general appliance, air curtain machine, humidifier, etc.Specification:Material: Aluminum & PlasticWeight: 143g/5ozHeating material: PTC thermistor Heating mode: heat through the flow of airLead material: high temperature resistance wire Heating life: over 3 years Mounting Hole Distance: 100*44mm (mounting hole: 8*4mm waist hole)Corrugation Length: 76mmSize: 120*51*26mm/4.7*2*1inchPackage List:1 x PTC Ceramic Air HeaterNote:Lead color is random.