... 1100 degree 4, no bubble no airline round glass discs1, round glass discs 2,tight siz tolearance3,Resistance 1100 degree, 2020 ... instrument, Scientific research, Optical industry etc About Lianyungang Suke Quartz Products Sales Co.,Ltd:We can supply more than 5 ... resistance,low OH), UV-stop quartz tube, red quartz tube, processed quartz tube, quartz rod, quartz plate, gray quartz tube, and so on. And ...