1 glass rod 2 purity 99.99% min 3,Resistance 1100 degree, ... work 4,Low OH 5, no bubble, no airline Glass rod1,glass rod: 2 purity 99.99% min3,Resistance 1100 degree, 1000 ... transmition,no airline,few bubbles.These types of quartz rod are widely used in the quartzware,laser making,fiber- ... 5 types and 70 speculations, ranging from 3-300mm clear quartz tube(high purity,good heating resistance,low OH), ...