Gold coated infrared quartz heater tube - No coating,no pollution, no harmful radiation. - Has the ... :0.6-5.0mm- Length:20-300mmFeatures:- Its low brightness, high thermal efficiency, the heating time to the human eye can ... , spray the barn, various types of drying room and bake; heater, food ,medicine , paper drying , printing ,Textile , infrared physical therapy, etc ...