Quartz tube coated with electronic heater filmThe film is one kind of Semiconductor electronic heater film.Mean power density: 0.1W 20W/CMFilm degree of uniformity:>85%Using long life: >10000hoursOperating temperature:<400 centidegreeAdaptable voltage: 3V 380V(including AC/DC)the size will be produced according to customers' detailed needs.And the price will discuss along with the power,quantity,etc.We also sell other products:Ceramic Heater,Mica heater