... with trace elementshas lustrous apearance,brilliant color Infrared Quartz Tube Heater Doped with trace elements,the red quartz tube,dark red ... available,is able to prevent all the UV rays and part of visible light and meanwhile make the most of infrared ... used in the field of far infrared heating,such as heater,sterilization tak,microwave oven,electric cooker,electric oven,surface drying ...