... Various sizes,high quality Quick temperature rising Fin heating element is of coiling or stamping metal heat sinks on the surface ... so on..2,In a limitation of heatingdevice,the power is reached at 1.5-2 times of the electric heating tube,reducing ... heating places.This is applied to the sirocco,ventilation,drying roomand warming etc.When its in the industry of machinerymanufacturing,automobile,textile ...