... glass material with the features of low expansion coefficient,high temperature resistance,high intensity, high rigidity, transparency and chemical stability. It doesn' ... range of borosilicate glass products, such as borosilicate tube, glass rods Glass tube OD from 4mm~315mm Glass rods dia from ... tubes wall thickness: 1.0mm~10mm Technical data for glass tube Main composition:1) SiO2: 80+/-0.5% 2) B2O3: ...