... 600mm10mmXD-QB300W-600W400-600mm13mm Physical Properties of electric quartz heater tube OpalescenceSiO2Heat ResistanceThe opaque quartz tube transmitting rate ... 30±3.0 The advantage of infrared quartz tube heater as bellow:1. Infrared radiation in instant heating ... service life, with SGS, RoHs approved8. Widely used in infrared heater, cooking, oven, stove, baker, painting dryer, drying apparatus, ...