... .Used for dryer in many domains 3.High radiation power IR Quartz Tube Heating ElementGold-coated quartz heating tube is generally ... double hole structure. Structure: Clear quartz tube, high temperature ceramic, heating wire, high temperature shield connect wire, pure gold-coated film.Life ... *33mm, 11*23mm Length: 300~2500mmPower: 300W~5000WVoltage: 220/380V IR Quartz Tube Heating Element