... airline 5. non-discolouring photovoltaic clear fused quartz glass rod1, fused quartz glass rod2,tight siz tolearance3,Resistance 1100 ... °C kg.m-32.2Degree of Hardness Moh’s Scale5.5-5.6Softening point(degree)1683Annealing point1215Defoamation Point1120Useful ... resistance,low OH), UV-stop quartz tube, red quartz tube, processed quartz tube, quartz rod, quartz plate, gray quartz tube, and so on. ...